Cramps don't come from lactic acid.
They come from electrolyte failure.
The science of why muscles cramp during exercise — and exactly what to do about it.
Informed Sport certified ·
Built by Alistair Brownlee ·
4.86★ (200+ reviews)
Products & Bundles
Start with a bundle or build your own stack. Bundles save you vs buying separately.
Electrolitos
400mg sodium · 150mg potassium · 25mg magnesium
CoreCtrl™
4,000mg taurine · 300mg potassium · 60mg magnesium
Geles energéticos
40g carbs · 0.25/1g salt · hot weather · heavy sweaters
Sistema listo para la carrera
40 Energy Gels · 40 Electrolyte Sachets · 8 CoreCtrl Sachets
Frequently Asked Questions
Current research (Peel 2024) points to altered neuromuscular control from electrolyte depletion — specifically sodium, potassium and taurine. Lactic acid theory largely replaced.
Yes — Peel (2024) showed 4,000mg taurine reduced exercise-induced cramping in a controlled trial. This is the exact dosage in CoreCtrl sachets.
Sustained sodium/potassium loss over 3+ hours + insufficient electrolyte replacement + neuromuscular fatigue in final 10km. Calf most common site due to sustained eccentric load.
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