224 Fun Facts About Fitness

What is the recommended minimum duration for moderate-intensity aerobic activity per week for adults?

150 minutes a week is the floor in US and WHO guidance, and since 2018 the US guidelines no longer ask for bouts of ten minutes or more: every minute of brisk movement counts toward it.

Which kind of training is built to add muscle mass and strength?

Resistance training works against weights, bands or body weight; a beginner's first gains come from the nervous system learning to recruit more muscle fibres, before the muscle itself visibly grows.

What does the acronym HIIT stand for in the context of exercise?

High-Intensity Interval Training can be very brief: in Izumi Tabata's 1996 study, four-minute sessions of 20-second sprints and 10-second rests raised aerobic fitness and lifted anaerobic capacity by 28%.

Which body chemicals were long credited with causing the euphoric 'runner's high'?

Endorphins got the credit for decades, but they cannot cross from the blood into the brain; studies now point to endocannabinoids, the body's own cannabis-like molecules, as the likelier cause.

Which of the body's energy pathways powers very short, explosive efforts such as a 100-meter sprint?

The phosphagen system runs on ATP and creatine phosphate stored in the muscle and is largely exhausted after roughly 10 seconds of all-out effort, which is why it powers sprints and single lifts.

Which warm-up technique moves joints through their range of motion, mimicking the coming activity?

Dynamic stretching takes joints through their range with controlled movements such as lunges; long held stretches before exercise can temporarily blunt performance, so warm-ups favour movement.

What does the 'E' in the RICE first-aid protocol stand for?

Elevation means raising the injured limb above the level of the heart, so that gravity helps fluid drain away and keeps the swelling down.

Adolphe Quetelet, the Ghent-born statistician whose 1830s height-and-weight ratio became a standard health measure, came from which country?

Belgium's Quetelet was hunting for the statistically 'average man' and never meant his ratio as a test of one person's health; physiologist Ancel Keys gave it its modern name only in 1972.

Pilates, originally 'Contrology', was developed by a fitness specialist from which country?

Germany was where Joseph Pilates was born in 1883, a sickly child with asthma and rickets who took up gymnastics and bodybuilding and by 14 was fit enough to pose for anatomical charts.

Which stretch technique holds a muscle in one position, without movement, for around 30 seconds?

Static stretching holds a muscle at mild tension for 20 to 45 seconds; it is better kept for after a workout, because long holds beforehand can temporarily dull muscle performance.

Alongside the quadriceps and adductor magnus, which muscle is a primary agonist in the squat?

The gluteus maximus, the body's largest single muscle, straightens the hip as you rise from a squat, and letting the heels lift off the floor reduces how much of the work it does.

A 'pulled hamstring' is the everyday name for which injury, graded from first to third degree?

Muscle strain means torn muscle fibres, graded by how many are torn; hamstrings usually go during sprinting, which is why track, soccer and basketball players pull them so often.

During which stage of sleep does the body release its largest pulse of growth hormone?

Deep slow-wave sleep brings the biggest growth-hormone surge, usually about an hour after falling asleep, one reason sleep counts as part of recovery from training.

Which fitness measure quantifies the proportions of fat, muscle, bone and water that make up a person?

Body composition explains why two people of the same height and weight can look completely different: one may carry more fat, the other denser muscle or heavier bone.

What does the Sanskrit word yoga literally mean?

To yoke or join is the sense of the Sanskrit root yuj, which descends from the same ancient Indo-European root that gave English the word 'yoke'.

Gym lore says protein must be eaten soon after training, during a period nicknamed what?

The anabolic window is shakier than gym lore suggests: a 2013 review of the research called the evidence that protein must be rushed in straight after training 'far from definitive'.

Which ancient Greek wrestler supposedly trained by carrying a calf every day until it was fully grown?

Milo of Croton, a six-time Olympic champion, is said to have carried the grown animal the length of the stadium, then slaughtered, roasted and eaten it.

Which overuse injury causes pain along the inner edge of the tibia in runners?

Shin splints, known to doctors as medial tibial stress syndrome, come from repeated stress on the shinbone; flat feet and running on hard surfaces such as concrete both raise the risk.

On which island was Joseph Pilates interned during World War I when he developed his method?

The Isle of Man held the Knockaloe camp, where the interned circus performer and boxer trained fellow inmates and began shaping the mat exercises he later called Contrology.

Regular aerobic exercise raises the level of which blood fat, nicknamed 'good cholesterol'?

HDL earns the 'good' label by carrying fat away from artery walls; a review of 25 trials found regular aerobic exercise raises it only modestly, by about 2.5 mg/dL on average.

Which stretch technique relies on an external force, like a partner, to hold the position?

Passive stretching uses a partner, a strap or gravity to take a joint to the end of its range and hold it there; an active stretch relies only on the body's own muscles.

What is the principle of gradually increasing exercise stress on the body to improve fitness?

Overload entered medicine in the 1940s, when physician Thomas DeLorme rehabilitated injured soldiers with steadily heavier weights; once the body adapts to a load, only a bigger one forces further gains.

Which standard treatment for sprains did the doctor who popularised it in 1978 later say can delay healing?

Icing was the I in Gabe Mirkin's 1978 RICE formula; in 2014 he reversed himself, saying routine icing can slow recovery by damping the inflammation that starts the body's repair work.

Which type of exercise, such as jogging or cycling, is commonly called cardio?

Aerobic exercise such as jogging, cycling or swimming is sustained at a pace the oxygen-using energy system can supply; it raises mitochondrial density in muscle and strengthens the heart.

The Cooper test, devised for the US military in 1968, measures how far you run in how many minutes?

12 minutes was enough: Kenneth Cooper showed that the distance covered tracked laboratory measures of oxygen uptake, so a stopwatch and a track could test large groups at once.

Which future US Army general is said to have devised the jumping jack in 1885 to haze West Point underclassmen?

John J. Pershing is said to have tugged an imaginary string to make cadets flap like puppets; the exercise is named after the jumping-jack toy, though, not after 'Black Jack' himself.

Which stretching technique contracts the stretched muscle or its antagonist, often with a partner's help?

PNF stretching, short for proprioceptive neuromuscular facilitation, alternates a held stretch with a muscle contraction, and studies rank it among the most effective ways to gain range of motion.

The Achilles tendon, joining the calf muscles to the heel, holds what distinction among human tendons?

Thickest and strongest tendon in the body, the Achilles still has a poor blood supply, and overuse, high heels or fluoroquinolone antibiotics can leave it inflamed or torn.

What is the informal name for excess post-exercise oxygen consumption?

The 'afterburn' is excess post-exercise oxygen consumption: the extra oxygen fuels the work of restoring the body to rest and the higher metabolism that comes with a raised body temperature.

Which type of exercise trains muscles to work together in everyday actions like squatting and lifting?

Functional fitness has its roots in rehabilitation: physical and occupational therapists have long used task-like exercises to retrain patients for the demands of daily life.

Josef Šálek set a 2023 world record by holding which position for over nine hours?

Plank champion Šálek lasted 9 hours 38 minutes in Pilsen; he said that five years earlier he had been 15 kg overweight and fond of alcohol and cigarettes.

Gunnar Borg's scale, which runs from 6 to 20, asks people to rate what?

Perceived exertion on Borg's scale starts at 6 because the numbers were built to track the pulse: multiply a rating by ten for a rough count, from 60 beats a minute at rest to 200 flat out.

The muscle ache that peaks one to three days after a hard workout goes by which abbreviation?

DOMS, delayed onset muscle soreness, comes from microscopic damage to muscle fibres, and the muscle adapts fast: repeat the same session and it hurts far less.

Which component of fitness is usually measured as VO2 max?

Cardiorespiratory fitness predicts health so strongly that in 2016 the American Heart Association urged doctors to treat it as a clinical vital sign and measure it routinely.

Which muscle, running diagonally down the front of the thigh, is the longest in the human body?

Sartorius comes from the Latin sartor, 'tailor', a name usually explained by the cross-legged position in which tailors once sat, which this muscle helps the leg to reach.

The marathon's 26 miles 385 yards dates from which city's Olympics?

London's 1908 Olympic marathon ran from Windsor Castle to a finish in front of the royal box, which worked out at 26 miles 385 yards; the figure became the world standard in 1921.

Indoor rowing machines are called ergometers because they measure what?

Work performed is what the name promises: 'ergometer' joins the Greek ergon, 'work', to 'meter', and rowers simply call the machine an 'erg'.

Which now-common gym machine did Sir William Cubitt introduce in 1818 as a prison punishment?

William Cubitt's 1818 treadwheel, ancestor of the treadmill, was proposed after he saw idle inmates at Bury St Edmunds gaol; prisoners' stepping was harnessed to grind corn or pump water.

Patellofemoral pain syndrome is grouped with other conditions under what informal name?

Runner's knee also strikes people who never run: the ache behind the kneecap typically flares after sitting for a long time with bent knees, as in a cinema seat or on a flight.

Stopping hard exercise abruptly can leave you dizzy because blood does what?

Pools in the legs: veins in working muscles widen during exercise, and the pumping of those muscles helps push blood back to the heart, so when they stop dead the return flow drops.

In Pilates, the muscles of the abdomen, lower back and hips are collectively nicknamed what?

The powerhouse, the band of muscle around the abdomen, lower back and hips, is treated in Pilates as the key to stability, which is why the method puts such stress on a strong core.

Foam rolling is essentially a do-it-yourself form of which recovery therapy?

Massage with a foam roller, known as self-myofascial release, gives a short-term boost to joint range of motion without weakening the muscle, reviews of the research have found.

What is the ability to move your joints through their full range of motion?

Flexibility is measured joint by joint, as the angle each can move through; without training, protective reflexes stop most adults from stretching a muscle to its full length.

Tennis elbow, felt on the outer side of the joint, strikes where forearm muscles anchor to which bony landmark?

Lateral epicondyle is the bony knob on the outer elbow; despite the name, many sufferers never pick up a racquet, since any work with repetitive, forceful use of the forearm can bring it on.

What is the ability of a muscle to generate maximum force in a single effort?

Muscular strength is usually tested as a one-repetition maximum, and it matters beyond the gym: in a large international study, weak grip predicted early death better than blood pressure did.

Which exercise is named after the American physiologist who devised it in 1939 as a quick fitness test?

The burpee began as a four-count move with no push-up or jump, created by Royal H. Burpee for his Columbia doctorate; the US Army adopted it in 1942 to test recruits.

The word 'sauna' comes from which language?

Finnish gave English the word in the 1880s, and Finland later supplied the evidence: a 20-year study of 2,300 Finnish men linked four to seven saunas a week with fewer fatal heart problems.

Which gym weight descends from the girya, a Russian metal weight used to weigh crops in the 18th century?

Kettlebell sizes still follow the old Russian pood, about 16.4 kg; circus strongmen took up the weights in the 19th century, and by its end lifting them had become a sport.

When muscles break down glucose without oxygen during hard effort, which by-product accumulates?

Lactate accumulates when anaerobic glycolysis kicks in, as in sprints and heavy lifts, because ATP is needed faster than aerobic metabolism can supply it; the liver later recycles lactate back into glucose.

Bodybuilding pioneer Eugen Sandow was born in 1867 in which Prussian city, now Kaliningrad in Russia?

Königsberg-born Friedrich Müller left Prussia in 1885 to dodge military service, joined the circus and took the stage name Eugen Sandow, adapted from his Russian mother's maiden name.

Which famous author helped judge Sandow's 1901 bodybuilding competition at the Royal Albert Hall?

Sir Arthur Conan Doyle, creator of Sherlock Holmes, judged alongside Sandow and sculptor Sir Charles Lawes, and the hall was so full that people were turned away at the door.

Which showman, later a Broadway legend, launched his career managing strongman Eugen Sandow in Chicago in 1893?

Florenz Ziegfeld noticed that crowds cared more about Sandow's bulging muscles than the weights he lifted, so he had him strike poses instead, billed as 'muscle display performances'.

Whose cameras filmed Sandow flexing his muscles in three short films in 1894?

Edison Studios shot Sandow at its Black Maria studio, flexing rather than lifting anything; the strip was among the ten films in the first commercial Kinetoscope programme.

Sandow measured classical statues in museums to develop what formula for the 'perfect physique'?

Sandow called the result the 'Grecian Ideal', a set of proportions taken from Greek and Roman statues in museums, and deliberately built his own body to match them.

On The Jack LaLanne Show, which co-star's tricks drew children to the screen?

A white German shepherd named Happy did tricks so that LaLanne could tell watching children to go and fetch their mothers for a workout; the show ran for 34 years.

In which city near his native San Francisco did Jack LaLanne open one of America's first health clubs in 1936?

Oakland got a gym that doctors told their patients to avoid, warning that LaLanne was an exercise nut whose weightlifting would leave them muscle-bound and ill.

Which barbell-on-rails apparatus did Jack LaLanne invent?

Jack LaLanne built a prototype of the Smith machine, a barbell running on vertical rails, in the 1950s; Rudy Smith had it refined and put into production in gyms, giving it his name.

Jack LaLanne, 70, towed 70 boats through Long Beach Harbor to which liner?

The Queen Mary was the finish line: retired from the Atlantic run in 1967, the liner was moored for good at Long Beach and turned into a hotel and tourist attraction.

Which health-food crusader, founder of a famous apple cider vinegar brand, gave the lecture that turned teenage Jack LaLanne to fitness?

Paul Bragg's lecture reached a 15-year-old who called himself a sugarholic and junk-food junkie; LaLanne said the talk turned his life around and later credited Bragg with saving it.

Charles Atlas once worked as a sideshow strongman at which New York resort?

Coney Island's circus sideshow billed him as a strongman; born Angelo Siciliano, he legally took the name Atlas in 1922, after being told he looked like a statue of the Titan.

What was the name of Charles Atlas's muscle-against-muscle exercise system?

Dynamic Tension, a name coined by Charles Roman, pits one muscle against another; Atlas claimed the idea came from watching a big cat stretch at the zoo.

In Charles Atlas's ad, what does a beach bully do to the '97-pound weakling'?

Kicks sand in his face: Atlas always said it had happened to him as a scrawny youth, and his course, which had struggled for years, prospered once adman Charles Roman put the scene in its ads.

Charles Atlas's mail-order muscle course was advertised for decades mainly in which kind of publication?

Comic books carried the cartoon-strip ads from the 1940s onward, and they kept running long after Atlas died in 1972, which is how generations of young readers came to know his name.

Who created the Mr. Olympia contest so Mr. Universe winners could keep competing for money?

Joe Weider launched it in 1965 so that champions had a paid title left to chase; three years later he and his brother Ben brought a young Arnold Schwarzenegger to California.

First Mr. Olympia Larry Scott gave his name to which biceps curl?

The preacher curl is named for its slanted bench, which looks like a pulpit; Scott did so many under trainer Vince Gironda that lifters came to call them Scott curls.

Which two bodybuilders share the record of eight Mr. Olympia titles as of 2025?

Lee Haney and Ronnie Coleman each won eight in a row, Haney from 1984 and Coleman from 1998; Coleman's bid for a ninth ended in 2006, when Jay Cutler beat him after four runner-up finishes.

Which bodybuilder nicknamed 'The Myth' handed Arnold Schwarzenegger his only Mr. Olympia defeat?

Sergio Oliva, a Cuban weightlifter who claimed asylum in the United States while competing in Jamaica in 1962, beat Schwarzenegger by four votes to three in 1969.

Which 1977 docudrama followed Arnold Schwarzenegger's bid for a sixth Mr. Olympia title in Pretoria?

Pumping Iron nearly went unfinished: the filmmakers ran out of money, and to raise funds they posed bodybuilders as 'living sculptures' on rotating platforms at New York's Whitney Museum.

Schwarzenegger won the 1980 Mr. Olympia while training to play which hero?

Conan the Barbarian needed a muscular hero, so Schwarzenegger was already in training when he came out of retirement; rivals cried foul and several vowed to boycott the 1981 contest.

In which Los Angeles-area community did Joe Gold open his first gym in 1965?

Venice Beach got a gym fitted with machines its founder had made himself: Joe Gold was a machinist who had learned as a boy to build equipment from scrap in his father's junkyard.

Which gym chain's bald-weightlifter logo was sketched on a napkin in 1973 by wrestler Ric Drasin?

Gold's Gym got its logo from a regular: Drasin, Arnold Schwarzenegger's training partner for four years, drew it during a break in training, and in 1978 he designed World Gym's gorilla too.

For how much did Joe Gold sell his gym in 1970 so he could return to sea?

Gold let the gym go for $50,000 to return to the merchant marine; the buyers, an antique dealer and a jeweller, could not make it pay and considered turning it into an antique shop.

Arthur Jones's prototype, the 'Blue Monster', grew into which brand of weight machines, first sold in 1970?

Nautilus took its name from the spiral cam at the machine's heart, which resembled the sea creature's shell and let the resistance vary through each lift.

What did the original Bowflex use for resistance instead of conventional weights?

Polymer rods that flex under load give the Bowflex its resistance; the design grew out of a patent conceived by Tessema Dosho Shifferaw while he was an engineering student in the United States.

The company behind Bowflex later bought the fitness arm of which famous American bicycle name?

Schwinn Fitness was one of several famous names the company bought with its home-gym profits around the turn of the century, StairMaster among them.

Which home-gym brand was sold to Taiwan's Johnson Health Tech after its maker went bankrupt in 2024?

Bowflex's maker filed for Chapter 11 in March 2024, blaming poor sales once the pandemic home-workout boom faded, and Johnson Health Tech bought the name along with its sister labels.

Which martial artist created Tae Bo?

Billy Blanks was born with a hip-joint anomaly that left him clumsy and teased as a child, yet he became a medal-winning karate competitor and built Tae Bo from taekwondo and boxing moves.

Which nutrient is the body's main fuel for high-intensity exercise?

Carbohydrate, stored as muscle and liver glycogen, is the main fuel for high-intensity exercise because it can be broken down quickly with or without oxygen; fat dominates at easy paces.

Which dance-fitness franchise did Judi Sheppard Missett start in 1969?

Jazzercise was born when Missett's dance students kept dropping out: they wanted to look like dancers, not become them, so she got them away from the mirrors and simplified the steps.

Jazzercise was created in which Illinois city, where its founder had studied at Northwestern University?

Evanston was home to Gus Giordano's jazz dance studio, where the founder was teaching beginners when she reworked her class for fun and fitness; the company's headquarters are now in Carlsbad, California.

Zumba was created by Beto Pérez in which Colombian city, nicknamed the world's salsa capital?

Cali is where Pérez, teaching an aerobics class without his usual music, fell back on his own salsa and merengue tapes; the improvised session grew into what he first called 'Rumbacize'.

Zumba's four basic rhythms are salsa, merengue, cumbia and which other?

Reggaeton completes the set; salsa and merengue came first, when Beto Pérez forgot his usual aerobics music one day and improvised a class to what he had with him.

Johnny G devised Spinning in 1987 while training indoors for which 3,000-mile endurance ride?

Race Across America runs coast to coast, about 3,000 miles; Goldberg was nearly killed on the road while training for it at night, so he brought his riding indoors and built a class around it.

Zumba Sentao classes use which piece of equipment as a dance 'partner'?

A chair is the only prop in Zumba Sentao, which works the muscles and the core through dance moves alone, with no weights to lift.

Planet Fitness markets itself with which slogan?

Judgement Free Zone sums up a business built for casual and first-time gym users rather than seasoned lifters; Michael and Marc Grondahl founded the chain in 1992.

What is the name of the siren Planet Fitness may sound when someone grunts loudly or drops weights?

The lunk alarm, a loud siren with a rotating light, backs the chain's pitch to casual gym-goers: 'lunk' is its word for the grunting, weight-dropping behaviour it wants to discourage.

In which branch of the U.S. military was Kenneth Cooper serving when he devised his famous running test?

Air Force flight surgeon Cooper directed its Aerospace Medical Laboratory, coined the word 'aerobics' and turned his research into the 1968 book of that name.

In which city did Kenneth Cooper found The Cooper Institute in 1970?

Dallas is where Cooper began tracking his patients' fitness in December 1970; by 1989 that study, covering more than 13,000 people, showed the least fit dying at over three times the rate of the fittest.

Jacki Sorensen devised aerobic dancing in 1969 for officers' wives at a US military base on which Caribbean island?

Puerto Rico's Ramey base was her husband's posting; after scoring 'excellent' on Kenneth Cooper's running test without ever having jogged, she realised dance could do the same job and set it to music.

Which shoe company popularized step aerobics by selling a plastic step unit from 1990?

Reebok launched the Step Reebok programme and its plastic step in 1990 after signing Atlanta instructor Gin Miller, who had devised step training on a milk crate while rehabbing a knee injury.

Whey protein, the staple of gym shakes, is a by-product of making which food?

Cheese making leaves whey behind as the watery liquid that drains from the curds; some goes into animal feed and processed foods, and its protein is concentrated and dried into the powder sold to gym-goers.

Coach Arthur Lydiard started the 1960s jogging craze with a club in which country?

New Zealand is where Arthur Lydiard got Auckland's joggers' club started; a visiting American coach joined one of its runs, took the idea home, and the United States' jogging boom followed.

In which Oregon city did Bill Bowerman start a joggers' club in 1963?

Eugene is home to the University of Oregon, where Bowerman coached track; his book Jogging sold more than a million copies and helped set off America's running boom.

Bill Bowerman famously ruined which kitchen appliance experimenting with a new shoe sole?

A waffle iron belonging to Bowerman's wife gave him the idea for a light sole that would grip; he ruined it in the experiment, but the pattern went onto Nike's Waffle Trainer of 1974.

What was the original name of the company Bowerman and Phil Knight founded in 1964?

Blue Ribbon Sports began by importing Onitsuka Tiger running shoes, which Knight sold from his car at track meets; it later took the name Nike, after the Greek goddess of victory.

Which Bowerman runner died in a 1975 crash?

Steve Prefontaine chose Oregon after Bowerman wrote that he could become the world's greatest distance runner there; he was killed in a car crash at 24.

Jane Fonda's Workout of 1982 boosted sales of which home device?

The VCR was still rare in American homes, so many buyers of Fonda's tape needed a player too; when she agreed to make it, she did not know a single person who owned one.

Which catchphrase did Jane Fonda popularize as an exercise instructor in the 1980s?

'Feel the burn!' was Fonda's encouraging shout, and it became a common saying along with 'no pain, no gain'; the leg warmers she wore gave a lift to an existing fashion trend.

Jane Fonda turned to aerobics after a broken ankle on The China Syndrome ended years of which exercise habit?

Ballet classes had kept Fonda fit for years; when the fracture ruled them out she tried Leni Cazden's exercise class, and that routine became Jane Fonda's Workout.

What was the name of Richard Simmons's Beverly Hills gym for overweight clients?

Slimmons opened in 1974 as The Anatomy Asylum, with a salad bar called Ruffage next door; Simmons, who had been badly overweight himself, started it because gyms catered to people who were already fit.

Fitness guru Richard Simmons sold pralines as a boy in which city, where he was born and raised?

New Orleans was his birthplace: Simmons grew up in the French Quarter, overweight and bullied at school, and later built his career on making overweight people feel welcome at the gym.

Which Italian director's films featured a young Richard Simmons among the 'freak show' characters?

Federico Fellini's casting director approached Simmons in Florence, where he was an exchange student, and gave him a bit part in Fellini Satyricon; a small role in The Clowns followed.

Which peripheral came bundled with Nintendo's Wii Fit when it launched in 2007?

The Wii Balance Board began as a plain bathroom scale; the developers decided that weighing yourself didn't make much of a game, so they added sensors until it could track balance.

Which Nintendo designer first unveiled Wii Fit in 2006, under the working title 'Wii Health Pack'?

Shigeru Miyamoto got the idea from his own habit of tracking his weight, which he and his family had come to enjoy talking about.

Which measure does Wii Fit's Body Test calculate?

Body mass index is worked out from the player's height and weight; after British parents complained that the game had labelled their daughter overweight, Nintendo apologised for the wording.

Which company acquired Fitbit in January 2021?

Google closed its $2.1 billion purchase of Fitbit in January 2021 after EU regulators extracted pledges not to use Fitbit health data for advertising.

Which smartwatch tracks daily activity with three coloured rings labelled Move, Exercise and Stand?

Apple Watch built the rings around sitting less and moving more: the blue Stand ring advances only when the wearer gets up and moves for at least a minute in an hour.

Which struggling smartwatch maker sold assets to Fitbit in December 2016?

Pebble went insolvent in December 2016 and sold most of its assets to Fitbit; years later its software code was made public, and founder Eric Migicovsky revived the brand in 2025.

In VO2 max, the dot over the V follows Isaac Newton's calculus notation and indicates what?

Per unit of time: Newton wrote a dot over a quantity to mean its rate of change, so the dotted V is the volume of oxygen used each minute, usually divided by body mass to compare athletes.

The Karvonen formula sets a training target using a person's age and which other measure?

Resting heart rate is subtracted from the estimated maximum to give the heart rate reserve, and the target is a share of that reserve added back on; as fitness improves, the reserve grows.

Which of these accounts for about 70% of the calories a sedentary adult burns each day?

Basal metabolic rate, the energy that keeps the organs running at rest, takes about 70% of the total; all physical activity adds about 20%, and digesting food the last 10%.

Resting metabolism slows by 1 to 2 percent a decade after age 20, mostly because the body loses what?

Lean (fat-free) mass is what drives resting energy use, so as it shrinks with age the metabolic rate falls with it, although the size of the decline varies widely between people.

One MET, the unit used to rate exercise intensity, is the energy an average adult uses doing what?

Sitting quietly costs one MET by definition, so every activity is rated as a multiple of rest: brisk walking counts as moderate at 3 to 6 METs, and anything above 6 is vigorous.

What does MET stand for in exercise science?

Metabolic equivalent of task is the full name; researchers publish a compendium of MET values for hundreds of activities, so that housework and sport can be graded on one scale.

Hans Kraus devised the six-exercise minimum muscular fitness test with which colleague?

Sonya Weber worked with Hans Kraus at Columbia-Presbyterian's posture clinic, where the six-exercise Kraus-Weber test grew out of lower back pain research before it was used on schoolchildren in the 1950s.

Which president created the President's Council on Youth Fitness by executive order in 1956?

Dwight Eisenhower acted after a study found American children far less fit than European ones, but he then rarely spoke on fitness and never attended the council's annual conferences.

Which future president wrote 'The Soft American' for Sports Illustrated before taking office?

John F. Kennedy published it as president-elect, setting out a four-point plan that included a White House committee on health and fitness; in office he widened the council's remit to all Americans.

Under which president was the Presidential Fitness Test retired for a health-based program?

Barack Obama's administration ended the test after the 2012-13 school year, favouring each child's own progress over rankings; a 2025 executive order called for the old test's return.

Which president created the Presidential Physical Fitness Award in 1966?

Lyndon Johnson's award honoured pupils at or above the 85th percentile on every item; that focus on top performers was later dropped for a program that tracks each child's own health.

Runners call a workout of fast bursts mixed with easy jogging a 'fartlek', a term that translates as what?

Speed play is the literal meaning; Scandinavian coach Gösta Holmér devised the method in the 1930s as a loose blend of steady running and interval training.

Which author of the 1977 bestseller The Complete Book of Running died of a heart attack while jogging in 1984?

Jim Fixx had weighed 214 pounds and smoked two packs a day before he took up running at 35; he died on his daily run at 52, and the autopsy found his coronary arteries badly blocked.

What does the school-fitness acronym PACER stand for?

Progressive Aerobic Cardiovascular Endurance Run is the full name: pupils shuttle between two lines in time with recorded signals, and the pace quickens every minute until they drop out.

Peloton co-founder John Foley was an executive at which bookseller when he came up with the idea in 2011?

Barnes & Noble was Foley's employer when he pitched a colleague on using technology to bring studio fitness classes to people with too little time to attend them.

In cycling, what is the peloton?

The main pack of riders is the peloton, from a French word that literally means 'ball' and also gave English 'platoon'; riders bunch up because sheltering behind others saves energy.

On which crowdfunding site did Peloton sell its first bike in 2013?

Peloton's 2013 Kickstarter campaign offered the first bikes at an early-bird $1,500 and raised just over $300,000; the first connected bike with a tablet shipped in 2014.

Which Peloton product was recalled in May 2021 after safety concerns involving children?

Peloton recalled the Tread+ treadmill in May 2021 after a child's death and dozens of injuries, having first rejected the Consumer Product Safety Commission's request before changing course.

Who founded CrossFit with Lauren Jenai in 2000?

Greg Glassman, a former gymnast, founded CrossFit with his then-wife Lauren Jenai in 2000 and ran it until stepping down in 2020 after his remarks about George Floyd.

What is a CrossFit-affiliated gym commonly called?

A box is the usual name for an affiliate; unlike a franchise it runs its classes as it likes, and the first, CrossFit North, opened in Seattle in 2002 for followers of the online workouts.

The CrossFit benchmark workout 'Fran' pairs pull-ups with which movement?

Thrusters, a front squat driven straight up into an overhead press, were added to pull-ups by CrossFit's founder, who devised the pairing at 16 by mixing gymnastics with weightlifting.

CrossFit's founders opened their gym in 2001 in which California surf town?

Santa Cruz was the base from which the founders posted each day's workout online for their clients; police officers and soldiers elsewhere picked the workouts up, and affiliates followed.

Where were the first CrossFit Games held?

A ranch in Aromas, California, hosted the first Games, which felt more like a backyard barbecue than a championship; within a few years the event had outgrown it and moved to a stadium complex near Los Angeles.

The CrossFit hero workout 'Murph' honours a Navy SEAL killed in which country in 2005?

Afghanistan is where Lieutenant Michael Murphy was killed during Operation Red Wings; the workout was his own, which he called 'Body Armor' and did wearing a weighted vest.

Strava's name comes from a word meaning 'strive' in which language?

Swedish 'sträva' means to strive; in 2018 the app's public heatmap of users' routes turned out to trace the outlines of secret military bases, and Strava promised simpler privacy settings.

Strava's two main co-founders first met as members of which university's rowing crew?

Harvard is where Michael Horvath and Mark Gainey rowed together in the 1980s; they first discussed a network for athletes in the mid-1990s and returned to the idea in 2007.

The 10,000-steps-a-day target began as a marketing campaign in which country?

The target started in Japan with the Yamasa company's 1965 'manpo-kei' ('10,000-step meter') pedometer, sold on the fitness enthusiasm around the 1964 Tokyo Olympics.

Which future US president brought a mechanical pedometer home from France and is often credited with inventing it?

Thomas Jefferson never patented any of his inventions, so nobody can say whether he improved the French device or simply introduced it to America.

Which endurance race combines a 2.4-mile swim, a 112-mile bike ride and a marathon?

The Ironman was dreamed up in Hawaii by a Navy officer and his wife, who strung together the courses of three existing island events: a rough-water swim, a round-Oahu bike race and the Honolulu Marathon.

The ancient Greek forerunners of dumbbells, called halteres, were also used for which event?

The long jump was done with a haltere in each hand: the jumper swung the weights forward at take-off and back again just before landing, which added distance to the leap.

The word 'dumbbell' comes from a silent version of what apparatus used for exercise in England?

A church bell without the bell: the 'dumb bell' was a rope-pull apparatus used for exercise, and sometimes to practise ringing, and its name passed to the hand weights.

The large inflatable exercise ball, first made by an Italian plastics firm in 1963, is commonly named after which country?

Switzerland gave the ball its English name: physiotherapists there used it to treat children and then adults, and the American therapists who took up the exercises called it the Swiss ball.

How much does a men's Olympic barbell weigh?

20 kilograms is the men's standard; the bar is built to flex, or 'whip', storing elastic energy during a lift, and to survive being dropped from overhead.

What is the crosshatch pattern engraved on a barbell's grip called?

Knurling is cut into the steel so that a lifter keeps a solid grip; a men's Olympic bar is knurled at the centre too, while a women's bar leaves the centre smooth.

What is the British English term for a push-up?

Press-up is the British name; under either name the exercise needs no equipment, which is one reason armies and school teams have long handed it out as a punishment.

Which push-up variation shifts the most work onto the triceps?

Diamond push-ups are named for the shape the hands make when the thumbs and index fingers touch; the closer together the hands are placed, the harder the triceps have to work.

A pull-up done with an underhand, supinated grip is commonly called what?

A chin-up is simply a pull-up with the palms turned towards the lifter; a 2017 study found the muscles worked were broadly similar whichever grip was used.

In yoga, the low plank held with bent elbows is known by what Sanskrit name?

Chaturanga Dandasana, the four-limbed staff pose, is the low plank held with elbows bent in the sun salutation; the straight-arm plank is Phalakasana or Kumbhakasana.

A 2023 British Journal of Sports Medicine review found which kind of training best lowers blood pressure?

Isometric exercises, static holds such as the wall squat, produced the biggest falls in resting blood pressure across 270 trials, ahead of cardio, weights and interval training.

Which Icelandic strongman won the 2018 World's Strongest Man title?

Hafþór Júlíus Björnsson won in Manila after three second places and three thirds, the first Icelander to take the title since 1996; he also played The Mountain in Game of Thrones.

Which deadlift stance is banned in strongman but allowed in powerlifting?

Sumo means gripping the bar inside a very wide stance, which suits lifters with mobile hips or short arms; powerlifting rules allow it, but strongman accepts only the conventional stance.

Which is the only lift contested in Paralympic powerlifting?

Bench press is the only discipline, a pure test of upper-body strength open to athletes with eligible physical impairments; the best lift more than three times their own body weight.

The word calisthenics joins the Greek for 'strength' with the Greek word for what?

Beauty is the 'kallos' in calisthenics; the word appeared in the 1830s for gymnastic exercises thought suitable for girls, meant to develop the figure and graceful movement.

Hua Tuo, who devised 'Five Animals' health exercises about 1,800 years ago, was a physician of which Chinese dynasty?

Han dynasty physician Hua Tuo modelled the exercises on the movements of animals such as the tiger, deer and bear; histories also record him using anaesthesia in surgery.

Which exercise, now practised mostly for health, began as a Chinese martial art?

Tai chi was created for combat and self-defence; over the years the emphasis shifted to health, and studies now link it to better balance and fewer falls in older people.

Which of tai chi's five traditional family styles is the most widely practised around the world?

Yang style spread furthest because Yang Chengfu took out the explosive releases of power and kept slow, steady, expansive movements that ordinary students could manage.

Creatine was named after the Greek word for what?

Creatine takes its name from the Greek kreas, 'meat', because Michel Eugène Chevreul isolated it from skeletal muscle extract in 1832.

Which sprinter's use of creatine before the 1992 Barcelona Olympics brought it to public attention?

Linford Christie's use was reported by The Times days after his 100-metre gold; only low-potency creatine was on sale then, and products made for strength athletes soon followed.

Precor's EFX of 1995 was the first of which gym machine?

The elliptical trainer was designed to mimic running while sparing the body: the feet stay on the pedals through every stride, so the joints escape the repeated impact.

The StairMaster was launched in 1983 by a company based in which city in Oklahoma?

Tulsa firm Tri-Tech unveiled the StairMaster 5000, a revolving staircase, at a trade show; the machine caught on so widely that people called every stair climber a StairMaster.

The original NordicTrack machine of 1975 was built to imitate which sport?

Cross-country skiing was Ed Pauls's sport: an engineer who got home after dark, he built the first machine in his Minnesota garage so that he could train for a local race.

Which two lifts are contested in Olympic weightlifting?

The snatch and the clean and jerk are each attempted three times, snatch first, and a lifter's best in each is added into the total that decides the medals.

Which two kinds of hypertrophy contribute to muscle growth?

Sarcoplasmic and myofibrillar growth differ: the first stores more glycogen in the muscle, the second enlarges the fibrils that contract; early strength gains, though, come largely from neural adaptation.

What is the main trigger for muscle growth?

Mechanical tension, the force a muscle produces against a load, is the currently accepted trigger; it switches on the mTOR signalling pathway, which speeds up the building of new muscle protein.

What is the phase of a repetition in which the muscle lengthens called?

The eccentric phase is when the muscle lengthens under load, as in lowering a biceps curl; the shortening phase is concentric, and eccentric work causes most post-workout soreness.

Which two sports were invented in YMCA gyms?

Basketball and volleyball both came from YMCA instructors in Massachusetts: James Naismith in 1891, then William Morgan, who wanted a gentler game for older businessmen.

Who founded the YMCA in London in 1844?

George Williams, a draper, saw that young men drawn to the city for work had little to do but visit taverns, and began with prayer and Bible-reading meetings among his fellow workers.

To which gym chain did Jack LaLanne later license his health clubs?

Bally was then a maker of pinball and slot machines; it bought its way into health clubs in 1983 and later put its own name on the former LaLanne gyms.

Colombian Beto Pérez turned Zumba into a business in which US city?

Miami is where Pérez teamed up with Alberto Perlman and Alberto Aghion; the three sold the workout on video through infomercials before licensing instructors to teach it.

Which muscle stem cells donate new nuclei to fibres during hypertrophy?

Satellite cells lie on the surface of a muscle fibre; under training they fuse with it and donate nuclei, which are not lost when training stops and probably explain 'muscle memory'.

Orangetheory's proprietary 'splat points' count minutes spent in which heart-rate zones?

Orange and red are the top two of five heart-rate zones, shown live on studio screens; classes are built so that members collect at least 12 splat points, one for each minute spent there.

Which German educator, called 'Turnvater', invented the parallel bars, rings and pommel horse?

Friedrich Ludwig Jahn opened the first open-air Turnplatz in Berlin's Hasenheide in 1811, seeding the modern sports-club movement and the apparatus of artistic gymnastics.

Which boutique indoor-cycling brand opened its first studio on Manhattan's Upper West Side in 2006?

SoulCycle was started by instructor Ruth Zukerman with two of her riders, Elizabeth Cutler and Julie Rice; Zukerman left in 2009 and co-founded the rival Flywheel the next year.

Which ancient physician is said to have stuffed animal skins for patients to toss, an early medicine ball?

Hippocrates is said to have used the stuffed skins as therapy; the modern name came in the nineteenth century from a Professor Roberts, who called it a medicine ball because exercise with it restored and preserved health.

Which upmarket gym chain did siblings Danny, Vito and Lavinia Errico open in Manhattan in 1991?

Equinox grew from that single club into a luxury brand, and in 2019 it carried the name beyond gyms by opening a hotel in New York's Hudson Yards.

Which 18th-century machine of cranks and flywheels is cited as an early ancestor of the exercise bike?

The Gymnasticon was patented in 1796 by Francis Lowndes, a specialist in electrical therapy, who meant it to exercise the joints of the whole body, with or without the patient's effort.

Which sports drink did University of Florida scientists invent in 1965 for the school's football team?

Gatorade is named for the Florida Gators, ten of whom tested the first batch. The original recipe was little more than water, salt, sugar and lemon juice.

In which US state did Navy commander John Collins stage the first Ironman triathlon to settle who was fittest?

Hawaii already had three endurance races on one island, so Collins chained them together: a rough-water swim off Waikiki, a bike race around Oahu and the Honolulu Marathon. Twelve of fifteen starters finished.

The 72 stone steps that Rocky Balboa climbs in his famous training montage lead to an art museum in which city?

Philadelphia nearly got a different scene: Sylvester Stallone first wanted Rocky to carry his dog Butkus up the steps, but the bullmastiff proved too heavy.

Which bodybuilder, Schwarzenegger's rival in Pumping Iron, went on to play television's Incredible Hulk?

Lou Ferrigno was cast as the Hulk in 1977, the year the documentary came out. He lost most of his hearing to infant ear infections, which he says gave him his determination.

The marathon recalls the legend of Pheidippides, a messenger who ran with news of victory over Persia to which city?

Athens is where the legend has him gasp "we have won!" and drop dead. Herodotus, the main source for the war, mentions no such run, only a far longer one to Sparta to ask for help.

Which urban movement discipline, popularised by Frenchman David Belle, takes its name from a military obstacle course?

Parkour is a respelling of "parcours du combattant", the army obstacle course built on Georges Hébert's training methods. Its practitioners were long known as traceurs.

Which Three's Company star became the television face of the ThighMaster in a string of 1990s infomercials?

Suzanne Somers made the gadget a household name. It began life in Sweden as a physical therapy device called the V-Bar, invented by a medical intern.

Which running workout, devised in the 1930s by coach Gösta Holmér, has a Scandinavian name meaning "speed play"?

Fartlek mixes fast bursts and easy jogging in one unbroken run. Holmér sent his runners round a forest loop and told them to speed up whenever instinct moved them.

Which skin-tight staple of the 1980s aerobics studio is named after a French trapeze artist who popularised it?

Leotard honours Jules Léotard, who performed the first flying trapeze routine in 1859 and inspired the song about the daring young man. He simply called his costume a maillot.

Jane Fonda's Workout, the chart-topping 1982 exercise tape, helped drive American sales of which machine?

Video recorders were so new that Fonda did not know a single person who owned one. Buyers needed a machine to play the tape, and by 1985 about a third of US homes had one.

Which actress played aerobics instructor Jessie Wilson opposite John Travolta in the 1985 health-club drama Perfect?

Jamie Lee Curtis starred in a story drawn from Rolling Stone articles about the singles scene at Los Angeles health clubs. Quentin Tarantino later called the film "woefully underappreciated".

Which property of water reduces the pull of gravity on the joints during a water aerobics class?

Buoyancy floats part of the body's weight, which is why pool classes are recommended for people with arthritis or weak joints. The push and pull of the water supplies the muscle work.

Which country calls jogging "cooper" after its World Cup-winning footballers trained on Kenneth Cooper's methods?

Brazil prepared its 1970 squad on the aerobics author's fitness programme, and after the trophy came home his surname passed into Portuguese as a word for going for a jog.

Richard Simmons's best-selling aerobics tapes of the 1980s invited fans to sweat along to which kind of music?

Oldies gave the Sweatin' to the Oldies tapes their name. Simmons knew his audience: he had weighed 268 pounds at his heaviest before losing more than 100 of them.

Competitive aerobics has been governed since 1995 by the world federation of which Olympic sport?

Gymnastics took the discipline in after national federations lobbied for it, and the first official world championships, held in Paris, drew 34 countries. Routines are judged under a Code of Points.

Which sideways step, used in the polka, the Electric Slide and freestyle aerobics, crosses one foot behind the other?

Grapevine steps run side, behind, side, across, all travelling in one direction. Dance writers were describing the figure as early as 1914, as part of the One-Step.

Which global group-fitness brand is named after an Olympic discus thrower who later served as mayor of Auckland?

Les Mills threw the shot and discus for New Zealand across two decades and opened his first gym in 1968. His son Phillip founded the company that carries the family name.

Gin Miller built her step aerobics routines after a physical therapist told her to rehab by stepping on and off what?

A milk crate, upturned and 11 inches tall, proved too high, so Miller swapped it for her 8-inch front porch step and built a workout around the climb.

Which muscle does the dumbbell fly primarily work, sweeping outstretched arms together in a hugging motion?

Pectoralis major is the thick, fan-shaped muscle of the chest that pulls the arms toward the midline. Pointing the elbows down during a fly shifts work off the front of the shoulder and onto the pecs.

The cable pull-down, drawing a bar from overhead to the chest, is designed to develop which back muscle?

Latissimus dorsi is Latin for "broadest of the back", and it is the "lat" in lat pull-down. An overhand grip activates it most, while the width of the grip makes no difference.

Which muscle is isolated by the cable push-down, a move that straightens the elbows against a weighted rope or bar?

Triceps brachii has one primary job, extending the elbow, and the push-down is that job done under load. Changing the grip shifts the effort between the muscle's three heads.

Which muscle capping the shoulder is the prime mover when dumbbells are raised straight out to the sides?

Deltoid comes from the Greek capital letter delta, after the muscle's triangular shape. Its middle fibres power a lateral raise while the front and rear fibres contract to steady the arm.

Which paired muscle, informally known as the "six-pack", is the main target of the abdominal crunch?

Rectus abdominis is crossed by bands of connective tissue that divide it into separate bellies, which is what creates the six-pack look. Its Latin name simply means "straight abdominal".

The barbell shrug, which simply hoists the shoulders toward the ears, is used to develop which upper-back muscle?

Trapezius is named for its four-sided trapezium shape, running from the base of the skull to the mid-back. Only its upper fibres lift the shoulder blades; the lower fibres pull them down.

Which two-headed calf muscle is worked hardest when heel raises are done standing with the legs straight?

Gastrocnemius is Greek for "stomach of the leg", after the bulge it makes. Because it crosses the knee as well as the ankle, bent-knee seated raises slacken it and hand the work to the deeper soleus.

The hanging leg raise, a staple of abs routines, is in fact driven mainly by which muscles?

Hip flexors, chiefly the iliopsoas, do the lifting while the abs mostly brace to hold the spine steady. Curling the pelvis upward at the top is what makes the abs work through a range of motion.

Which muscle along the ribs is nicknamed the "boxer's muscle" for driving the shoulder blade forward in a punch?

Serratus anterior takes its name from the Latin for "to saw", after its saw-toothed shape. It hauls the shoulder blade forward and around the rib cage, the reach at the end of a jab.

Kegel exercises, published by American doctor Arnold Kegel in 1948, are repeated squeezes of which muscle group?

Pelvic floor exercises had already been described in 1936 by Margaret Morris, who got little credit at the time. They are commonly prescribed in pregnancy to prepare the body for childbirth.

Which French scientist coined the terms "aerobic" and "anaerobic" in 1863 to describe how certain bacteria live?

Louis Pasteur built the words from the Greek for air and life while studying microbes that thrive with or without oxygen. About a century later the label was borrowed for the gym as "aerobics".

Which organelles in muscle cells depend on oxygen to turn fats and sugars into energy for long, steady efforts?

Mitochondria are where oxygen is used to metabolise fats, sugars and proteins. Regular aerobic training has been shown to remodel them in tissues such as the heart and liver.

Aerobic metabolism breaks glucose down completely, leaving water and which gas?

Carbon dioxide and water are all that remain when fuel is fully burned with oxygen. Plants run the same reaction: their respiration makes about half the CO2 released by land ecosystems each year.

Aerobic and anaerobic pathways are two routes to making which molecule, the immediate energy source for muscle cells?

ATP, short for adenosine triphosphate, is the primary source of energy for cellular reactions. Without oxygen each glucose molecule yields just two, far fewer than the full aerobic route.

In the "talk test" for moderate-intensity aerobic activity, a person should be able to talk but not do what?

Sing a line at a truly moderate effort and the breath runs out. At vigorous intensity even talking fails: it is hard to say more than a few words without pausing for air.

At low intensities such as an easy walk, aerobic metabolism draws most of its energy from which fuel?

Stored fat, held in adipose tissue, is the body's preferred fuel at an easy pace. Harder efforts need energy faster than it can be released, so the fuel mix shifts as intensity climbs.

Which oxygen-binding protein gives slow-twitch muscle fibres, the ones built for aerobic endurance, their red colour?

Myoglobin is abundant in slow-twitch fibres, which is why they look red. Fast-twitch fibres lean on anaerobic energy, contract two to three times as quickly and are pale by comparison.

Which process, the biochemical basis of anaerobic exercise, converts glucose into energy without needing oxygen?

Glycolysis is a chain of ten enzyme-driven reactions. It takes over when muscles need energy faster than aerobic metabolism can supply it, as in a flat-out sprint.

Which aerobic energy pathway is named after the Sheffield biochemist who identified it in 1937?

Krebs cycle honours Hans Krebs, who won the 1953 Nobel Prize in medicine for working it out. Textbooks also call it the citric acid cycle or the TCA cycle.

Which 30-second all-out pedalling trial, named after the institute that introduced it in 1974, measures anaerobic power?

Wingate test riders warm up, then the full resistance is applied within seconds of the start and they pedal flat out for half a minute. The result shows both peak anaerobic power and anaerobic capacity.

In weight training, what is the name for a partner who stands ready to help if a heavy lift fails?

Spotter duty is most common on pressing lifts done lying on a bench. A heavy barbell squat calls for two of them, one at each end of the bar, ready to hook an elbow under it.

Which term describes the shrinking of muscle from disuse, as when a broken limb spends weeks in a cast?

Atrophy sets in quickly: an immobilised body sheds roughly half a percent of its total muscle mass per day. Depending on how long it lasts, the loss can be fully reversed with activity.

Weight-bearing exercise such as lifting or jogging is widely recommended to help prevent which bone-thinning condition?

Osteoporosis risk falls because strength work builds bone density, not just muscle. It also strengthens tendons and ligaments and lowers the risk of injury in older people.

Endurance training raises the density of which tiny vessels that feed oxygen to working muscle fibres?

Capillaries multiply around well-exercised muscle fibres, one of the changes that makes them better suited to prolonged work. Trained muscle also stores more fuel on site.

Which term describes multi-joint lifts such as the overhead press, as opposed to single-joint isolation exercises?

Compound movements are the ones that improve whole-body coordination and stability, so the NSCA recommends favouring them over isolation work when the goal is strength and power.

Which medical term describes the unusually slow resting pulse that years of endurance training can produce?

Bradycardia in an athlete reflects an enlarged, stronger heart that can beat just 40 to 60 times a minute at rest. In an untrained person the same reading would usually point to a heart condition.

Which measure of the heart's pumping, about five litres a minute at rest, rises during hard cardio?

Cardiac output is simply beats per minute multiplied by the blood pumped per beat. Regular aerobic training raises the per-beat figure, so a fit heart can move the same volume with fewer beats.

Which breath-holding technique, used by lifters to brace the trunk, is named after a 17th-century Bologna anatomist?

Valsalva maneuver means bearing down against a closed airway, which stiffens the torso under a heavy bar. Its namesake, Antonio Maria Valsalva, was chiefly interested in the human ear.

Which chemical is the white "chalk" that weightlifters and rock climbers rub on their hands for a drier grip?

Magnesium carbonate works as a drying agent, soaking up sweat wherever a firm hold matters. It also comes suspended in liquid form, sold as liquid chalk.

In strength training, which term describes two different exercises performed back to back with no rest between them?

Superset pairings often match opposing muscle groups, so one recovers while the other works. Research found that this version packs in significantly more training volume than a traditional format.

Which explosive jump-training method, created by Soviet scientist Yuri Verkhoshansky, was given its name by Fred Wilt?

Plyometrics began as the "shock method": athletes dropped from a height and felt a jolt on landing before rebounding. Wilt coined the name after watching Soviet track and field athletes prepare.

Which age-related loss of muscle, slowed dramatically by exercise, has a Greek name meaning "poverty of flesh"?

Sarcopenia was coined from sarx, flesh, and penia, poverty. Lack of exercise is a significant risk factor, and staying active remains the treatment of choice.