A hot 90-minute class can cost a salty sweater 2,500+ mg of sodium — and a standard sports drink puts back only about 330. Sweat sodium varies tenfold between people — your formula is not the label. Get yours in 60 seconds.
Standard products give everyone the same dose. Sweat sodium ranges 200–2,000 mg/L between people — a tenfold spread. Here is what the numbers actually look like.
| Athlete / session | Sweat rate | Na loss/hr | Sports drink gives | The gap |
|---|---|---|---|---|
| Light runner, cool day, 60 min | 0.7 L/hr | 560 mg | ~330 mg | 230 mg short |
| Average cyclist, 90 min moderate | 1.1 L/hr | 1,210 mg | ~330 mg | 880 mg short |
| Hot yoga, 105°F, 90 min | 1.0 L/hr | 1,700 mg | ~330 mg | 1,370 mg short |
| Salty sweater, summer trail race, 2 hr | 2.1 L/hr | 3,780 mg | ~330 mg | 3,450 mg short |
Na loss = sweat rate × sodium concentration (800–1,800 mg/L range). Standard sports drink: 1 serving ~330 mg Na. Sources: GSSI, PMID 33895027; hot-yoga row: Alrefai 2020, PMID 33230967 (1.54 L per 90-min Bikram class) at ~50 mmol/L.
Educational estimate — not medical advice. If you have cardiac or kidney conditions, high blood pressure, or are pregnant, consult a sports medicine physician before changing your sodium intake.
See exactly what your current drink covers for the workout above — and the cheap top-up that closes the gap.
Off-the-shelf tabs give everyone the same dose — but sweat sodium varies 200–2,000 mg/L between people.i We don't manufacture anything. We do the math and point you at proven products.
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