Situation 1: If you simply want to lose weight, do aerobic exercise first, and then do anaerobic exercise.

For people who want to lose weight, aerobic exercise is the most suitable. The principle of aerobic exercise to lose weight is that when people do endurance exercise for a long time, the calories provided by sugar in the body are far from meeting the needs. By increasing the supply of oxygen, the fat in the body is oxidized and decomposed, and heat energy is generated for human use. This kind of exercise, oxygen can not only fully burn (that is, oxidize) the sugar in the body, but also consume the fat in the body, enhance and improve the cardiopulmonary function, prevent osteoporosis, and adjust the psychological and mental state, which is the main exercise mode of fitness. Therefore, if you are overweight and want to lose weight through exercise, it is recommended to choose aerobic exercise, such as jogging and cycling.

After aerobic exercise, you can do some anaerobic exercise appropriately. Anaerobic exercise can strengthen muscle compactness, maintain the durability of fat-reducing effect, and make the weight-reducing effect more lasting.

Situation 2: If you want to gain muscle, do anaerobic exercise first, and then do aerobic exercise.

Anaerobic exercise refers to the high-speed and intense exercise of muscles in the state of "hypoxia". Anaerobic exercise is mostly an exercise with high load intensity and strong instantaneity, which is difficult to last and the time for fatigue elimination is slow. The biggest feature of anaerobic exercise is that the oxygen intake during exercise is very low. Because the speed is too fast and the explosive force is too strong, the sugar in the human body cannot be decomposed by oxygen, so we have to rely on "anaerobic energy supply". This kind of exercise produces too much lactic acid in the body, which leads to muscle fatigue and won't last long. I feel muscle pain and shortness of breath after exercise.

After anaerobic exercise, there can be some aerobic exercise, which can achieve the effect of reducing fat. But aerobic exercise should not be done more, because aerobic exercise will consume muscles to some extent.