If you are interested in a simple primer on the chemistry and biochemistry of weight loss, check out this episode of ABC (Australia) Catalyst: https://www.abc.

If you are interested in a simple primer on the chemistry and biochemistry of weight loss, check out this episode of ABC (Australia) Catalyst: https://www.abc.net.au/catalyst/where-does-fat-go/11015048 https://www.abc.net.au/catalyst/where-does-fat-go/11015048 The overall balanced equation is quite simple, showing fat molecules convert to CO2 and H2O. It shows quite clearly that you have to breathe oxygen in and carbon dioxide out in order to lose weight. I guess this is why high intensity exercise or endurance exercise aid in weight loss - in both cases you are elevating your breathing while at the same time exhausting your muscle glycogen stores.