| It's not the sweating that makes you burn calories in cardio, it's the constant movement. Your body has to burn energy to make your muscles move, your heartbeat goes faster to supply your muscles with blood because oxygen is also needed to release the energy in glucose (or whatever your body is burning for energy), and the energy expended raises your body temperature so you sweat. Sweating itself doesn't burn calories when the heat is from an outside source. You'd actually be better off sitting somewhere cold so your body has to burn energy to stay warm. |