The order of human energy consumption is sugar and fat protein. 30 minutes ago, sugar was the energy supply, and after 40 minutes, fat was the main energy supply, so it takes more than 40 minutes of aerobic exercise to lose fat. After 1 hour, it is mainly powered by protein. Although it is rarely used, it is also breaking down muscles.
Therefore, it is best to add oxygen for 40-60 minutes after half an hour without oxygen, with scientific diet and regular work and rest, and the effect is the best.