Jimmy Mohamed@dr.jimmy.mohamedInstagram

Courir quand il faut chaud, bonne idée pour maigrir ? 🥵 Chronique santé du Dr. Jimmy Mohamed à 8h46 dans

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what it claims

Running in hot weather is neither an effective nor a safe strategy for weight loss, because the immediate weight loss seen on the scale mainly corresponds to water lost through sweat, not a loss of fat mass.

overstated

The idea that heat helps to 'burn' more fat is a myth widely contradicted by physiology.

noli's read

The idea that heat helps to 'burn' more fat is a myth widely contradicted by physiology. While a workout in hot weather may show a lower number on the scale, this is a temporary dehydration that must be offset by hydration for the sake of health. Research confirms that thermoregulation (cooling the body through sweat) is the metabolic priority, not lipid mobilization. Furthermore, exercising in high heat increases the risks of heat stress, injury, and premature fatigue, making this practice counterproductive for sustainable weight loss. Experts instead recommend an approach based on consistency and heat acclimatization rather than seeking extreme temperatures.

the sources

Claimed by Jimmy Mohamed. Noli grades the claim, never the person.

Decoded by Noli · July 18, 2026 · the original post

What the graded evidence says

Evidence: B+

Effect: time course and physiological effect of heat acclimatization; expert consensus on hot-weather training — heat adaptations largely develop over ~1-2 weeks of repeated exposure (majority within the first week); meta-analysis confirms lower core temperature, lower heart rate and improved performance in the heat; consensus advises ~10-14 days acclimatization plus hydration and pacing
Measured on: healthy exercising adults and athletes

The popular '3-4 weeks to acclimatize' figure overstates it; most adaptations appear within the first 1-2 weeks, though they fade within weeks if heat exposure stops. Reducing intensity and staying hydrated in the heat is well supported; exact temperature cutoffs are individual.

Jimmy Mohamed in the Register113 claims graded · solidity 92/100See their record →