The knowledge base
Hydration science.
Written for athletes.
Practical articles on sweat testing, hydration strategy, and race-day fuelling — written by Reece Noble, physiotherapist and PF&H certified sweat tester. Locally relevant. Science-backed. No product push.
Why You're Cramping at Kilometre 30 (And It's Not What You Think)
Cramping has been blamed on dehydration for decades. The science tells a more complicated — and more useful — story. ...more
Race Day
July 07, 2026
Why Two Athletes at the Same Race Have Completely Different Hydration Needs
Same distance, same conditions, same finish line — and wildly different sodium requirements. Here's why. ...more
Sweat Testing
May 06, 2026
The One Test That Doesn't Change — Why Your Sweat Data Is Useful Forever
Unlike VO2 max or lactate threshold, your sweat sodium concentration is fixed. Test once, and the data never expires. ...more
Sweat Testing
April 06, 2026
Blood Sodium vs Body Sodium — Why the Test Your Doctor Orders Won't Help You Race
Your blood sodium is tightly regulated regardless of how hard you train. Here's why that makes it useless for race planning. ...more
Hydration Science
March 11, 2026
What "Salty Sweater" Actually Means — And How to Know If You're One
The white residue on your kit isn't just cosmetic. It's a signal that most athletes completely misinterpret. ...more
Hydration Science
February 09, 2026
A Physiotherapist's Perspective — Why Hydration Is a Performance AND Injury Issue
Most physios treat the symptom. Understanding the hydration picture means addressing one of the root causes. ...more
Performance & Recovery
January 13, 2026
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