Heat · 4 min read · 30 June 2026
Start hot races cold
Precooling is one of the best-evidenced tools in endurance sport, and it's still underused.
In the heat, your performance ceiling is partly set by how much thermal headroom you have before your brain starts turning the pace down. Precooling buys you headroom before the gun goes.
The research favours mixed methods: a cooling vestPrecool · £140
Phase-Change Cooling VestChoose size through the warm-up plus an ice-slurry drink 30 minutes out. Then hold your sodium with SaltSalt · £32
High-Sodium Electrolytes and dress for evaporation in the Glacier teeGlacier · £48
Cooling Training TeeChoose size .
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