When we are exercising, we need the body to consume energy storage materials in the body to provide energy. According to the adequacy of oxygen supply, exercise can be divided into aerobic exercise and anaerobic exercise. (There is 100 meter anaerobic exercise, football, etc. It is characterized by low oxygen uptake and lactic acid production during exercise; Aerobic exercise includes jogging, swimming and cycling. It is characterized by long exercise time and sufficient oxygen supply.
Sometimes we consume too much energy and store it in the form of triglycerides (that is, fat).
When there is oxygen supply and fat is needed for energy supply, triglyceride molecules will be oxidized, which will consume a lot of oxygen molecules and produce waste such as carbon dioxide and water.
If we regard our body as a car, the food we usually eat is fuel, which provides energy for the normal activities of our body.
If we eat too much food and can't consume fuel, it will cause excess energy, which will be converted into fat by the body and stored. This is the most essential reason why we become fat. However, besides fat, there are other energy storage substances, such as sugar.
At the beginning of exercise, the body consumes glycogen stored in muscles in the early stage. With the increase of time, glycogen participation gradually decreases, and fat will become the main energy source. Therefore, if you want to lose weight, you'd better choose moderate and low intensity aerobic exercise for a long time (more than 40 minutes) and stick to it.