These little powerhouses not only help fuel our training, but they define the exact ways our bodies respond to the training we do. New data says mitochondrial check ups could even help with the future of training and life in general.

Double threshold days and lactate meters have propelled Jakob Ingebrigtsen and others to the top. Should the rest of us follow suit?

Women Take The Lead Retreat is creating space for women of color in the running industry to network, learn, and connect with tools to advance their careers

Discover stories from Backpacker, Outside Online, Clean Eating, Climbing, and other brands across the Outside Network

Growing up as an immigrant had her believing that she had to be stronger than everybody else just to get by. When she started trail running, she was physically tested in ways she found thrilling.

It's one thing to think about a workout; it's another to actually do it. Here's how to make sure workout brain doesn't convince you to quit.

A new documentary highlights the grit and guile of the Desert RATS Stage Race

We review six of the hottest smartwatches from the last year by price, specs, and an eight-point rating system.

A former elite runner finds her creative stride by designing activewear that tells the story of her family history in the French West Indies

The boutique Portland brand debuts its best shoe yet, a versatile ultra crusher that’s modular design can be customized to you.