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All the digital training data in the world may not tell you whether your workout was any good

A rigorous new study finds small changes in heart rate and subjective feelings of recovery. Do they matter?

A new study of athletic career trajectories finds that early success is less meaningful than you’d think

Researchers assess the potential benefits—and downsides—of the hundreds of bioactive compounds in your morning brew

Tramadol has a long history of suspected abuse among cyclists, and now there’s enough data to put it on WADA’s banned list

When illness or injury forces you to take a complete break, researchers have some ideas on how to limit the fall-out

Sports scientists weigh in on the trends that will keep the PRs coming

Analyzing glucose data from endurance athletes offers new(ish) insights, with the potential of more to come

They don’t necessarily save energy, but a new study suggests they might save your legs

To optimize your health or supercharge your training, you sometimes need to look beyond the lab

There are both healthy and harmful ways to get away from it all, psychologists point out

A high-tech approach called metabolomics offers a new perspective on how your body bounces back from 26.2 miles

Records are falling and times are dropping. Is it the shoes, or something else?

The latest research suggests that muscle oxygen can detect exercise thresholds, with no blood required

Researchers present new findings on mental fatigue, mental training, and the importance of your surroundings

Scientists consider the latest spikes, individual variability, and the pros and cons of training in racing shoes

Scientists reconsider the assumption that it only helps strength and power athletes

Plyometrics can make you a more efficient runner, and it turns out they don’t need to be complicated or risky

Researchers look back on the lessons from 25 years of “live high, train low”

Smog season is here. Recent research offers some clues on how to help your body adapt to the stress.

New data finds that endurance- or speed-oriented muscle fibers don’t determine how you respond to strength training

In-race data collected during the world championships sheds new light on how top endurance athletes avoid overheating

There’s plenty of hype about ways of boosting your respiratory system. Some—but not all—of it is real, according to a new review.

A new review weighs the evidence that strength and training adaptations vary across the phases of the menstrual cycle

Researchers use isotope tracers to accurately calculate calorie burn and other parameters during a grueling full-day ride

So-called “augmented feedback” can offer both information and motivation. A new study tries to separate the effects.

While trying to qualify for an English Channel crossing, swimmers swallowed ingestible thermometers. They got really cold.

Age may be just a number—but so is your weekly mileage

Has Maurten finally figured out how to harness the power of baking soda without paying the gastrointestinal price?

Double threshold days and lactate meters have propelled Jakob Ingebrigtsen and others to the top. Should the rest of us follow suit?

Researchers test the assumption that top athletes are more sensitive to internal cues, with surprising results

A new study tests the idea that, with the right building blocks, connective tissue can repair itself after all

A big-data analysis of Strava training logs estimates the slowdown for marathoners who miss a week or more

A new model breaks down the ability to fight through adversity into its constituent parts

Army researchers assess the evidence on what makes you stronger, and speculate about new approaches that might work even better

A head-to-head lab showdown finds that power and efficiency depend on your preferred running surface

Cautionary tales from the official journal of the Wilderness Medical Society

Moving from long to short efforts during a workout maximizes the training stimulus

A selection of recent titles to keep you warm by the fire 

The downside of veggies, the upside of emptying your colon, and more

New research finds that, all else being equal, runners don’t have more gastrointestinal problems than cyclists

Research explores the differences between active and inactive twins, and why such pairs are so rare

Replacing lost salt is a pillar of sports nutrition, but new research suggests more isn’t always better

Researchers in Japan try to figure out which miles matter most for long-distance runners

Elite running coaches weigh in on what it means to be talented and how they predict who will run fastest

A pair of experiments find that mice choose to run less after taking antibiotics, even though their endurance is unchanged

New data shows that, unlike a car, you can’t perform well with a half-full fuel tank

New data outlines how much they run, how long it takes to resume training after giving birth, and how well they return to competition

The unending search for a competitive edge in sports has a cost. It’s called the Red Queen effect.

Runners make bigger improvements following a flexible workout schedule rather than sticking with a predetermined one

A new twist in the old debate about caffeine's performance-enhancing powers suggests it helps maintain oxygen levels in the blood

Women are said to be 10 to 12 percent slower than men across distances, but a new analysis finds narrower gaps for sprinters

There’s encouraging new evidence on artery stiffening and the risks of too much exercise

A new study aims to resolve long-standing debates about how much drafting helps runners, and finds that even back-of-the-packers save meaningful time

Mounting evidence suggests that women respond differently to endurance training after menopause. Could donating blood be the solution?

A deep dive into the sports science literature shows why you should be wary of results that seem too good to be true

A small Minnesota company believes it has developed the future of fitness tech. Now it has to teach the rest of us how to use it.

Here’s what the science says about making it to the top as quickly and efficiently as possible

A new study assesses how childbirth altered the career trajectories of the fastest marathoners in history, with encouraging results

New research explores whether the performance-boosting effects of positive self-talk can be attributed to more than just the absence of negativity

Ten great reads for the beach (between workouts) or the airport (between flight delays)

A team of Canadian Olympic sports psychologists tries to nail down the intangible “it”

A new study compares active and passive interval recoveries, but physiology isn’t the only factor to consider

The algorithms used to estimate your training load have some fundamental flaws, scientists say

Most people run the same pace regardless of how far they’re running, according to new research

How well you can see your surroundings matters, but subtle gait changes also burn more energy

Like the two-hour marathon chase, next month’s assault on the seven- and eight-hour Ironman barriers will require some rule-bending

Runners smack the ground harder—but get injured less—in more cushioned shoes. New research explains why.

Scientists studying mice found that their competitive efforts depended on their social ranking rather than their strength or speed

An analysis of power data from pro cyclists quantifies the effects of hot and cold air temperatures on performance

You can’t run fast without using your arms—or can you?

Despite years of research, the athletic potential of Montmorency cherries isn’t as sweet as it sounds

An analysis of pro cycling data finds that altitude-born South American riders race better at high altitudes than their lowland-born rivals

The oral health risks associated with heavy sports-drink use seem clear, but the evidence remains murky

New findings suggest that results from large training studies can’t be generalized to individuals

A new study of identical twins shows that, despite their reputation as inert rubber bands, Achilles tendons adapt to exercise

New research explores how physical and mental factors affect how athletes raise their game when it counts

A popular training rule for endurance athletes faces scrutiny from skeptical scientists

A new study gathers insights from 71 trans-ocean rowers who (mostly) made it to the other side

A new study grapples with a familiar question: How much of athletic success is physical, and how much is mental?