Arnold Schwarzenegger fueled a lot of the interest in strength training, beginning in the 1980s.

Modern bodybuilding evolved in the 19th century.

Discover how strength training may help your brain and what happens inside your cells when you work out with this original '1440 Explores' podcast.

The Greeks weightlifted using massive stones and admired strength—but they viewed muscles differently

Strength training doesn't require fancy equipment—cans, water bottles, and shopping bags work well.

Official recommendations state that healthy adults should perform progressive resistance training that increases weight and repetitions over time.

Strength training appears to make for a healthier, youthful-looking brain.

Watch this how-to video series on how to start strength training.

Explore how to safely start 'strengthmaxxing' with body weight—not actual weights.

Ancient Greek gymnasium: where philosophy met fitness

In ancient Greece, gymnasiums were not just places of physical training, but centers of intellectual life. This article explores the ways in which exercise, philosophy, and education were deeply intertwined, reflecting a cultural belief that physical fitness was essential for mental development.

Resistance training can help fight osteoporosis, especially in menopausal women.

World records are often broken later in the day—and scientists wonder if muscle clocks explain the difference.

Running became more popular in the mid-20th century

Once considered a fringe activity, running eventually became an American interest. The trend was spurred in part by the 1966 book "Jogging," which was cowritten by Bill Bowerman, the cofounder of Nike.

A 15th-century university student documented a surprisingly detailed fitness plan.

Bill Bowerman brought running for fitness to America

Nike cofounder Bill Bowerman once cowrote a book with a doctor, W.E. Harris, called “Jogging.” Published in 1967 by New York, Grosset & Dunlap, it introduced America to the idea of running for health, instead of just sport—and kicked off the fitness frenzy of the 1970s that fueled Nike’s early success. (Some readers may experience a paywall).

Gladiator training is known mainly from art, not ancient texts

Since literary sources provide little information about gladiator training, scholars rely on visual evidence. This illustrated essay draws on artifacts from the Metropolitan Museum of Art, including an oil lamp from Cyprus showing a gladiator practicing against a wooden stake.

Exercise can lead to muscle microtears, but the body's repair systems cause those fibers to grow back larger.

Adults need 2 days of muscle-strengthening activity weekly—yet most of us aren't doing that.

Richard Hittleman brought yoga to TV

"Yoga For Health" was a 1960s television show that sought to make yoga accessible for everyday Americans. Richard Hittleman, the show's host, walked viewers through basic postures, introducing them to the practice's therapeutic benefits. "We know that within us there's great forces, and great power, and great beauty," he says in this 1961 episode, "and the idea is to bring it out."

Health food broke into the mainstream by the 1980s

A 1984 New York Times story noted that Americans were eating less red meat than a decade prior, and that, in general, the country was “talking, thinking and worrying about what they eat to a degree unique in the nation's history.” The feature then details foods that were then considered bizarre: whole-grain muffins, hummus, and a variety of vegetarian dishes. (Some readers may experience a paywall.)

The origin story of the Paralympic movement and its founder, Dr. Ludwig Guttmann

Dr. Ludwig Guttmann, the founder of the Paralympic movement, revolutionized the treatment of spinal injuries. His belief in the power of sports for rehabilitation led to the creation of the Paralympic Games, now celebrated every Olympic year. This in-depth article from The History Press details the life and achievements of Dr. Guttmann, and includes historical photos and videos of the veterans-turned-athletes whose lives he changed.

What did it take to eat like a gladiator?

If you think gladiators were all rippling muscle, think again. Evidence suggests fighters weren't as cut as we've been led to believe. This article dives into the diets of ancient Roman gladiators, who may have eaten mostly vegetarian. Archaeological evidence gathered from the skeletons of 68 gladiators found in a 2,000-year-old Turkish grave suggests the fighters' diets mainly relied on barley and legumes, with little animal protein.

Gladiators followed a mostly vegetarian, high-calcium diet

Analysis of skeletons from a gladiator cemetery at Ephesus by researchers at the Medical University of Vienna found little meat consumption but unusually high calcium levels—likely from drinking wood ash mixed with water to promote weight gain and protect vital organs.

Pilates was invented by an acrobatic WWI prisoner of war

As the Great War raged on, and as months gave way to years, the imprisoned Joseph Pilates explored a question that he had pondered since childhood: Could he reimagine the capabilities of the human body through an anatomically based method of training, taking inspiration from scientific treatises, the carefree movement of children, and the dexterous ease of cats? Read this article to learn about the birth and legacy of Pilates.

Dave Asprey is considered one of the fathers of modern biohacking

Entrepreneur Dave Asprey wants to live longer than anyone else, a desire that's led him to biohacking. Asprey relies on supplements, stem cell treatments, rigid dieting, exercise, and more. The inventor of Bulletproof Coffee has no medical or nutritional training, though that's not unusual among biohacking's DIY experimenters.

Astronauts exercise on the International Space Station

Astronauts maintain bone, muscle, and cardiovascular health with physical activity. It's crucial that they make time to exercise for approximately two hours per day. This resource offers a behind-the-scenes look at how high-intensity workouts help prevent muscle atrophy, bone density loss, and aerobic decline during monthslong space missions.

Why yoga teachers are dissecting cadavers

Thousands of fitness professionals are choosing to attend cadaver workshops to improve their understanding of anatomy and their teaching abilities. Though 3D virtual models give students a fresh way to explore the human body, medical students say experiencing the intricacies in person is far more instructive. As fitness professionals increase their understanding of the muscular and skeletal systems, their movement cues and instructions evolve in tandem.

Resistance training is linked to better memory and cognitive function in older adults.

Contestants in an annual extreme sports competition are encouraged to use steroids and growth hormone, using athletes as guinea pigs.

How to carry more than your own bodyweight

Those images showing a villager carrying an enormous bundle on their back, or balancing a basket of fish on their head—how's that possible? This article dives into the clever tools and habits of strength training some cultures employ as part of their labors, from the springy bamboos used by Vietnamese farmers to the headbound burdens of Himalayan sherpas.

Retired gladiators often became trainers, referees, or exhibition fighters

Few gladiators survived to retirement, but those who did rarely left the arena behind. Many returned for high-pay exhibition bouts, trained new fighters, served as referees, or leveraged their fame into unexpected careers, including local politics.

History's weirdest weight loss fads, fact-checked

Nothing catches popular attention more than a claim to have found a quick weight-loss technique. History shows us such claims are often unfounded. Dr. Michael Mosley explores extreme weight-loss tips from history, from tapeworms to vinegar diets.

A 19th-century Protestant minister in Germany encouraged 'natural eating,' creating a precursor to the natural food movement.

Hysterical strength allows someone to lift a car off their child

When the body responds to an acute crisis—say a family member trapped under a car—people can sometimes perform seemingly superhuman feats. This is more than an urban legend: In 2012, a 22 year-old-woman lifted a vehicle off her father, and seven years earlier another man lifted a vehicle off a trapped cyclist. Yet scientists are still unraveling details about why this can occur.

Most Westerners don't need more protein, despite the protein boom

You can find the macronutrient in snack bars and pretzels, shakes, and more, even though most normal diets in the West are already protein-heavy with meat and milk. A mix of increased exercise culture and influencer sway has led to a market hungry for it.

The exercise sweet spot is shorter than you'd think—and longer workouts aren't generally better.

Some athletes warm up with equipment from other sports

Baseball superstar Shohei Ohtani uses a cricket bat; his teammate Yoshinobu Yamamoto throws a javelin. Quarterback CJ Stroud shoots free throws. The reasons are partially physical (it's good to exercise different parts of your body) and partially mental (it's nice to take the pressure off with someone else's game).

Interest in intermittent fasting outpaces the science

The public interest in fasting diets has outpaced the science behind related health claims. This article details how the science of fasting diets is mainly exploratory and focused on longevity and disease prevention. Current findings suggest fasting kick-starts regenerative processes in the body, decreases inflammation, and improves health outcomes overall. However, much of this research focuses on the short-term impact of fasting.

A 1893 speech from a Hindu monk in Chicago set the stage for yoga in the US, which exploded in popularity in the next century.

Developing adaptable brain-body systems lets athletes thrive beyond 30

Success in high-level sports after age 30 relies on physical fitness and building brain resilience through deliberate training, recovery, and stress regulation. This creates a feedback loop where body and mind reinforce each other.

How Chuck Norris 'Facts' gave birth to the modern meme

In the early 2000s, anonymous, absurdly hyperbolic jokes about one B-level action star suddenly appeared everywhere on the internet. "Chuck Norris Facts" were spawned by a high school senior, who'd noticed something funny online and taken it to the next level. As Ryan Hockensmith shows in this detailed history, Spector's joke laid the groundwork for the modern meme.

Natural food stores began sprouting up in the US in the 1960s and 1970s

Health food stores began opening in the ‘50s, though they were primarily focused on vitamins and holistic supplements. Natural food stores, however, provided pesticide-free produce and often relied on local farmers for their products. One of the first was New Age Natural Foods, in San Francisco’s Haight-Ashbury neighborhood, which opened in 1965.

How ancient Roman gladiators got ready to rumble

Before they could lay the smackdown in the arena, gladiators were professionally trained, combining a physical regimen with an education in the rules of the ring. Contrary to popular belief, archaeological evidence suggests most gladiators weren't killed in the action, and women may have fought on rare occasions. This article breaks down a life of a Roman gladiator.

BKS Iyengar emphasized yoga's physical aspect

The guru’s 1966 book “Light On Yoga” included detailed instructions for over 200 postures, presenting a version of yoga that emphasized it as a form of exercise with controlled breathing, believing that its physicality was the key to unlocking its spirituality. The book was the first mass-market manual to show the poses, furthering the Western impression that yoga was primarily about exercise.

Doctors are prescribing social activities—and seeing good results

Physicians, especially in the UK, are asking patients what they enjoy and then prescribing a consistent regimen of doing that type of activity to improve fitness and overall health, including community exercise classes, volunteering, and spending time in nature. This approach may provide better incentives to stick with an activity.

Supplement sales soared during the pandemic, alongside growing distrust of the health establishment, amplifying a trend that endures—even when some of the products don't even work.

The scientist that biohacked a buff frog

If a tree frog was injected with a DNA mixture containing follistatin, a gene that may influence muscle growth, would it become buff? Josiah Zayner hopes so. By learning how to biohack animals, he hopes people are one step closer to feeling more comfortable "whipping up DIY gene therapy."

Exercise can change your genes without changing your DNA.

Vince McMahon turned wrestling into a consolidated, national enterprise

In 1982, Vince McMahon purchased the World Wrestling Federation, which would later be renamed World Wrestling Entertainment, and quickly wiped out the WWE’s smaller regional promotions. By the late 1990s, he minted superstars like Chyna, Dwayne “The Rock” Johnson, and “Stone Cold” Steve Austin.

Theos Bernard's book on yoga formalized the practice for many Americans

His 1943 book “Hatha Yoga: The Report of a Personal Experience” was supposedly based on a 1936 trip through India and Tibet, though it’s believed many of the details were fabricated. Still, the book featured photos of Bernard in numerous postures that were some of the first published in the US, helping to popularize yoga in America.

The Presidential Fitness Test, designed to measure and promote schoolchildren's health, has returned to schools under the Trump administration after it had been retired by the Obama administration in 2012.