Sweatr blog
The science behind performing on race day
Guides, deep-dives, and practical advice for runners, cyclists, and triathletes who want to get their fueling right.

Hydration Science
Why Do I Cramp During Marathons? The Science Your Watch Can't Tell You
Cramps ruined your race? Here's what actually causes them and how to build a hydration plan that fights back.
4 April 20269 min
Hydration Science
How much should you drink during a marathon?
The generic answer is 500ml per hour. The right answer is calculated from your body weight, sweat rate, and how hard you're actually working. Here's how to find your number.
20 March 20264 min