alex hutchinson

A step up from the 10-percent rule, this number will help you better understand your mileage from week to week.

Too much booze is bad news, research shows.

Telomere length, a marker of “biological aging,” responds to relatively high levels of physical activity.

Four studies test the accuracy of fitness prediction functions in watches.

Experts explain the science behind what might be slowing you down.

Hot conditions make your body crave carbs—but that’s not a bad thing.

These key risk factors predict bone injury for females surprisingly well.

It’s finally possible to reap the benefits of low-carb workouts without feeling like total garbage.

Whether you love it or loathe it, reducing your training prerace pays off—if you do it right.

After five years of Sweat Science, a summing-up of what really matters.

A daily dose of the popular endurance booster, combined with exercise, enhances brain "plasticity.”

Whether you’ll finish strong—or not—in your next marathon depends on the answer.

It sure feels that way, but science doesn’t necessarily agree.

A new book explores the science of extreme endurance, and finds that both mind and muscle matter.

A pilot study finds promising results from restricting certain short-chain carbohydrates.

New research measures the distortion in “perceived time” during all-out exercise.

A common weight-room supplement may be useful in the long run, too.

It’s far from rocket science, but simple online reminders offer surprising benefits.

Here’s the latest research on what’s behind increases in flexibility.

The evils of sitting get all the headlines, but being constantly on your feet is no picnic either.

It’s a commonly used performance enhancer, but it has some limitations.

These worthwhile new titles offer information, inspiration, education, and more.

Analysis of ancient skeletons sheds light on the sudden increase in arthritis rates.

Surprisingly, strengthening your legs may be more effective than strengthening your back.

Here’s a detailed look at how the best runners in the world go about their business.

As Mo Farah goes for another world 10,000-meter title, don’t expect to see even splits.

This means that you can trust your sense of thirst during a run.

Prolonged exercise actually liberates water stored within your body.

“Worry less about what things look like,” says Jared Ward after co-authoring a study on running form.

Digging into the research behind a seemingly improbable health claim.

High- and low-arched runners cushion their foot landings differently.

Here’s a look at the arguments in favor of an unpopular proposal.