Erin Beresini (@eberesini) is Outside's Fit List columnist, and author of new book Off Course: Inside the Mad, Muddy World of Obstacle Course Racing. She lives in Los Angeles with 10 bikes and a dresser full of spandex. (Website: erinberesini.com)
On-the-go fitness tools for athletes
Two weeks of full-time, one-on-one instruction at Exos can set you back $4,800. Here’s how to get many of the same performance benefits without taking out a second mortgage.
How endurance athlete Patrick Sweeney puts away nearly 3,000 calories a day on the ketone diet
Goodbye crazy binges, hello almond butter?
An expert look at the most feasible—and the nuttiest—submissions
A crude guideline for randy athletes
A compelling case for ditching hill repeats
Inside Specialized and Stanford University’s new alliance to research cycling’s effect on kids with ADHD
The wrongful-death suit, filed after 28-year old Avishek Sengupta drowned at the Tough Mudder Mid-Atlantic event, had major implications for the obstacle-course racing industry
The secret to unlocking your athletic potential is in your genes, but scientists don’t know what they’re telling us—yet
When it comes to diets, Americans are fickle, fanatical, and not always well informed. And athletes are no exception.
And when they'll be smashed—because half the fun of records is watching them fall.
Inside the revolution to reclaim city waterways for recreation
Sorry, that wildly popular New York Times story is not for you
Secrets to lasting focus and motivation.