NEW MEMBER OFFER!

Get 35% off GOES, your essential outdoor guide

LEARN MORE

GET MORE WITH OUTSIDE+

Enjoy 35% off GOES, your essential outdoor guide

UPGRADE TODAY

Author

Alex Hutchinson

Alex Hutchinson is Outside’s Sweat Science columnist and the author of Endure: Mind, Body, and the Curiously Elastic Limits of Human Performance. He lives (and runs) in Toronto.