Blood Sodium vs Body Sodium — Why the Test Your Doctor Orders Won't Help You Race

Reece Noble

Published on: 11/03/2026

Your blood sodium is tightly regulated regardless of how hard you train. Here's why that makes it useless for race planning.

Hydration Science

What "Salty Sweater" Actually Means — And How to Know If You're One

Reece Noble

Published on: 09/02/2026

The white residue on your kit isn't just cosmetic. It's a signal that most athletes completely misinterpret.

Hydration Science

Reece Noble

Published on: 11/11/2025

Sweat isn't just water. Understanding what's in it — and why it varies so much between people — is the foundation of smart hydration.

Hydration Science