electrolytes

Here's what to keep in mind about hydration supplementation at all elevations

We tried three at-home sweat tests so you don’t have to. Here’s what sweat tests are best, and how to use that information for a trail racing breakthrough.

We know we lose a lot of sweat when we run, especially the extreme distances of ultramarathons. So how should you strategize salt replacement?

When electrolyte levels drop too low, performance can suffer. Avoid that dip by dialing in your nutrient intake.

GI distress is a leading cause of DNF’s in trail races. Here’s how to dial in your race-day fuel routine to maximize success.