However, why does such a simple action have such a magical effect? As we all know, stretching will make the chest organs of the human body squeeze the heart and lungs. Human anatomy and physiology tell us that 1 10-year-old Yu Shengguang, a long-lived old man, is tired from work and always has to fight a set of white tiger boxing or stretch a few times before continuing to work. This is the fitness philosophy that he realized all his life. Please stretch more after sedentary. This is advice for office workers and a magic weapon to keep you alive in spring. Keep an action for a long time. When you stretch, most of your body is involved in the activity. The blocked capillaries in the body relax accordingly, thus promoting the metabolism of blood in the body. Metabolites in the body are excreted through metabolism.