Why do I sweat so much when I work out?

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Sweating buckets in the gym usually means your body is good at cooling, not bad at fitness. Sweat is the evaporative cooling system, and its output scales with heat production - bigger bodies generate more heat, harder effort generates more heat, and hot humid rooms trap it. The counterintuitive fact: fit people sweat more and earlier, because training tunes the system to start cooling preemptively. Genetics set your baseline too - some people simply run sweatier.

So heavy workout sweat by itself needs no treatment - just management: hydrate before and during, replace fluid after - weighing yourself before and after tells you the loss, roughly 16 to 24 ounces of water per pound dropped - wear breathable fabrics, and accept it as the system working. MedlinePlus notes sweating is the normal temperature-control response to heat and exercise.

When sweating means more: sweating heavily at rest or at night without heat or effort, sweating with chest pain or shortness of breath - a heart warning, especially cold clammy sweat - drenching night sweats with fever or weight loss, and a sudden change in your sweat pattern all deserve a doctor look. Excessive sweating that soaks clothes daily without exercise is hyperhidrosis, which is common, treatable, and worth mentioning to a doctor rather than enduring.

Pymander is a free AI doctor, 24/7 by text. Describe when the sweating happens, and it can help you tell normal cooling from a check-worthy pattern.

Why do I sweat so much when I work out?

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