It's Time to Reevaluate Vitamin D as a Sports Supplement
Two new studies find performance benefits from high levels of the sunshine vitamin, but they're not the final word
Training & Performance
Decoding the DNA of 5 Olympic Athletes
A new study tries—and fails—to predict athletic greatness with a DNA test. Thank goodness.
When to Stop Strength Training Before a Big Race
Correctly timing all the elements of your taper can give you an extra edge on race day
There's a New Way to Choose the Right Running Shoe
Pronation is out of favor, comfort is too vague, but maybe measuring your "habitual motion path" will guide you to a shoe that minimizes your injury risk
Yes, Walking Is Sometimes Faster than Running Uphill
Top trail runners mix running and walking on steep terrain, but even scientists aren't sure how we choose which is better
This Pro Skier's 10-Move Core Workout Will Kick Your Ass
A creative, challenging at-home circuit to get you fit, no matter your sport
Rethinking What Power Meters Mean for Runners
A leading company redefines what it's actually measuring, and explains why that's what we really wanted all along
The 2020 Sweat Science Holiday Book List
Check out these titles for fans of science, endurance, fitness, and adventure
Test-Driving Apple's New Fitness+ Streaming Workout Service
The company's library of studio exercise classes, integrated with on-screen fitness data from your Apple Watch, launches today. Our Sweat Science columnist takes it for a spin.
Exercise Blocks Pain, But Only For Believers
A new study explores the links between exercise and pain perception, and how easily they can be manipulated