Working hours are 12 hours, calculated as 24 hours a day. In fact, such working hours do not exceed a person's fatigue limit. If you don't accept manual labor outside 12 hours after work, it is acceptable to do normal physical exercise. Therefore, regular work+regular physical exercise = normal people's living conditions. Even your exercise can be done on your way to work. If you go to work every day, you can adjust your rest time. If you drive (or ride a bike) to work, you can get up early and change the way of going to work to go to work slowly or quickly. This is also good aerobic exercise. Or buy some simple fitness equipment and finish physical exercise at home after work. Of course, while exercising, we should also ensure a balanced nutrition. This not only ensures the management of the body. It also maintains the normal and beneficial development of various indexes of the body.