Hi. I have been pondering how a human body loses mass from exercising but instead encountered a weird thought.
We often exercise in order to lose weight. When we exercise, stored chemical energy in fats are converted to mechanical energy. However, this conversion of energy does not equate to loss in mass, i.e. mass is conserved. Of course in reality we do lose weight but this is because of the excretion of water and salts. A good practice is to replace our water loss and salts after exercise. So that means exercise more does not result in weight loss!? The only time we loss mass substantially is when we defaecate.. So I should defaecate more instead of exercising to loss weight??![]()
But essentially, the often quoted "burn fat to lose weight" is wrong since mass is conserved during energy conversion! (Except nuclear fission/fusion)