Some people who are engaged in moderate or heavy manual labor think that they don't need to take part in physical exercise, because their work intensity is high and their physical strength is high. This view is incorrect. First of all, labor cannot be equated with sports, let alone replaced by sports. Labor is a kind of physical activity, which can make some tissues and organs get exercise and play a certain role in physical exercise, but labor and exercise are two different things after all. Childbirth is an action that is limited to local repetitive activities and fixed posture. Usually, one or several muscle groups are working, and other muscles make little or no effort. The result of long-term local labor is likely to cause local strain, body deformation, uneven thickness of limbs, uneven strength, and even long-term local pain and muscle weakness, which greatly limits the range of activities of the body. And most sports involve most muscle groups.

Secondly, the positions of the nerve centers that dominate labor and physical exercise are different. Physical exercise after work can make the nerve center that dominates labor rest, make the muscles of labor fully rest and relax, and physical exercise can eliminate the fatigue caused by labor. In addition, sports activities can also adjust our mental state and improve work efficiency.

In short, manual workers also need to take part in exercise. Physical exercise after work should pay attention to the choice of exercise mode and intensity, and should not participate in strenuous physical activities, so as not to deepen fatigue and affect the next day's work.