Heat doesn't just make you uncomfortable.
It actively degrades your performance.
A science-backed guide to fuelling,
cooling and electrolyte strategy for
athletes training and racing
in hot conditions.
Informed Sport certified ·
Built by Alistair Brownlee ·
4.86★ (200+ reviews)
Your Race Fuelling Calculator
Enter your race details and get a personalised gel and electrolyte plan.
Products & Bundles
Start with a bundle or build your own stack. Bundles save you vs buying separately.
CoreCtrl™
4,000mg taurine · 300mg potassium · 60mg magnesium
Geles energéticos
40g carbs · 0.25/1g salt · hot weather · heavy sweaters
Electrolitos
400mg sodium · 150mg potassium · 25mg magnesium
Sistema listo para la carrera
40 Energy Gels · 40 Electrolyte Sachets · 8 CoreCtrl Sachets
Frequently Asked Questions
Increases energy cost, accelerates glycogen depletion, amplifies electrolyte loss. ~1–2% drop per °C above 25°C in endurance events.
Add 1 extra electrolyte sachet per hour above cool-condition baseline when training above 25°C.
Reduces core body temperature before exercise. Can reduce core temp rise by up to 0.5°C — a measurable performance benefit. CoreCtrl is built for this protocol.
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