Why Two Athletes at the Same Race Have Completely Different Hydration Needs
Reece NoblePublished on: 06/05/2026
Same distance, same conditions, same finish line — and wildly different sodium requirements. Here's why.
Sweat Testing
Reece Noble
The One Test That Doesn't Change — Why Your Sweat Data Is Useful Forever
Reece NoblePublished on: 06/04/2026
Unlike VO2 max or lactate threshold, your sweat sodium concentration is fixed. Test once, and the data never expires.
Sweat Testing
How to Build Your Ironman Hydration Plan From Your Sweat Test Results
Reece NoblePublished on: 17/12/2025
A step-by-step guide to translating your sweat data into a leg-by-leg race day plan — from the swim exit to the finish line.
Sweat TestingRace Day
What Is a Sweat Test — And Do You Actually Need One?
Reece NoblePublished on: 16/09/2025
What it measures, how the test works, and who genuinely stands to benefit. A clear breakdown with no hype.
Sweat Testing