Exercise is for fitness. First of all, you should have a good mood to practice. Don't force it. If you don't aim at reducing fat, you can exercise as much as you want. Of course, it is better to practice more. Generally, the best exercise time is 45-60 minutes, and the total amount of one exercise cannot exceed 90 minutes.

Aerobic exercise: exercise cardiopulmonary function, reduce fat, enhance endurance and improve body shape.

Time period selection:

1. Breakfast and exercise after sunrise. Eat100g digestible food and a little milk 30-60 minutes before exercise.

2. Exercise for one and a half hours after breakfast.

3. Start two hours before dinner and eat 100g digestible food 30-60 minutes before exercise.

4, one and a half hours after dinner, one hour before going to bed, choose according to your own habits.

Aerobic exercise includes: swimming, running, aerobics, mountaineering, skipping rope, playing ball, etc. You can choose any one, and the time should be controlled at 45-60 minutes. Jogging is also ok. Controlling the bull's-eye rate means that the pulse is within (220- age) ×(65%-85%), and then you can do sit-ups and push-ups. Teenagers who want to grow taller can practice pull-ups, parallel bars and jumping, as well as some stretching exercises, mainly to keep their bones from being squeezed and stretched. Reduce abdominal fat and do sit-ups after aerobic exercise in 2-3 groups, with more than 25 in each group. ?