First of all, it is easy for people to divide left or right. When exercising, they unconsciously exert their strength with one hand. For example, the first five to ten senses, two arms exert force, and after ten senses, obviously tend to exert force at the same time. Therefore, muscles are asymmetrical. Methods: When exercising, try to give priority to the side with less stress and cooperate smoothly. After symmetry, naturally both of them exerted their strength.