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 ...

Esmée Gummer hit an 11-minute Hyrox PB just weeks after a 60km race – all while preparing for a 5,000km ultra across the UK.

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 ...

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 ...

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 ...

New perk: Easily find new routes and hidden gems, upcoming running events, and more near you. Your weekly Local Running Newsletter has everything you need to lace up! Subscribe today. Perhaps the most ...

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 ...

It only takes 3 days a week ...

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 ...