On a typical training ride in Spain’s Sierra Nevada, Tokyo Olympics triathlon champion Kristian Blummenfelt might start near Granada, at around 3,000 feet above sea level, and finish as high as 10,000 ...

Alex Hutchinson is a National Magazine Award-winning journalist and Outside’s Sweat Science columnist, covering the latest research on endurance and outdoor sports. Quick background: muscle oxygen ...

Men’s leggings have become an essential part of modern fitness apparel, providing both comfort and performance benefits. Athletes across different sports now rely on compression-based gear to improve ...