A little sweat never hurt anyone, but overheating? That’s a whole different beast. Whether you’re lifting in a gym that feels like an oven or running through a heatwave, we’ve all had those moments ...

The calories the sweat glands burn to make sweat are minimal. When you sweat, you may lose a bit of weight due to water loss, but that weight is restored when you rehydrate. Physical exertion and the ...