Hyrox is a brutally effective test of fitness because it forces you to build strength, speed and endurance at the same time – ...

Let’s travel back to the Paris Olympics—the women’s marathon event in particular. Twenty kilometers into the race, Sifan Hassan of the Netherlands was holding her pace and biding her time. “The moment ...

Long before global headlines called her “the world’s most beautiful runner,” Alica Schmidt was carving out a track life marked by persistence that never wavered. Over time, her craft sharpened, and ...

Speed and endurance are often viewed as opposing qualities, but in reality, they are deeply interconnected. Speed is the ability to move quickly, relying on fast-twitch muscle fibers and explosive ...

Good news: starting your running journey doesn't have to require diving in head-first and sprinting for 30 minutes straight.

Most training plans suggest mixing runs of various lengths and speeds, with a shift in focus - from endurance to speed, typically - as you get closer to a goal race. This approach, “periodsation,” is ...

Speed on the treadmill can sneak up on you, so keep an eye on how your legs feel the next day. Slot an easy run or a light shakeout after any session where you’ve been turning up the dial. It keeps ...

You know the saying, “It’s a marathon, not a sprint?” It may be used as a reminder to stop moving at warp speed and stay present, but it’s also clearly inspired by the idea that you can’t run 26.2 ...

You will feel this workout even if you only do a third of it. The bike-run-swim, max-effort triathlon can be done individually in under 20 minutes each, or you can double up and make a "BR-ick" out of ...

Technically, speed goes first, but the outcome for distance runners is a loss of endurance. First off, before I explain more, don’t get mad. Every time I address age-related performance decline in ...

Alex Hutchinson is a National Magazine Award-winning journalist and Outside’s Sweat Science columnist, covering the latest research on endurance and outdoor sports. New perk: Easily find new routes ...