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 ...

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 ...

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 ...

Core exercises that train your body to resist rotation, such as the Pallof press or weighted plank drags, can help runners boost speed and efficiency.

Development of the cardiovascular system helps to ease transition into the next phase while decreasing the chance of injury and delaying the onset of fatigue. The next improvement in this stage is ...

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 ...

You know what it feels like to run comfortably—comfortable!—and you’re likely also familiar with the burn of going all-out. But what about the range of paces that lie in between these two extremes?

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 ...