This is directly related to your daily habits. Irregular diet, lack of sleep, depression and poor mental state will all affect a person's physical quality. I have been practicing fitness for a long time, and such problems are endless. My solution is to analyze a person's work and rest. As long as there is a problem, I will adjust my diet, sleep and rest properly. The advantages will be fully demonstrated in the next exercise. Only when the spirit is strong, the body is well conditioned, and the physical strength, motivation and physical strength are available, will there be no muscle weakness and chain loss.