Social media users were in awe at Johannes Klaebo's explosive uphill dash on skis after one clip of his gold medal-winning ...

Alex Hutchinson is a National Magazine Award-winning journalist and Outside’s Sweat Science columnist, covering the latest research on endurance and outdoor sports. If you haven’t rewatched the epic ...

Marathoners generally don’t lose any sleep over how fast they can sprint, nor do they spend time developing their top-end speed. But Veronique Billat, a French exercise physiologist and author of The ...