Because aerobic exercise can make people inhale dozens of times more oxygen than usual, inhaling more oxygen can obviously increase the content of meridian protein in the body, and the nutrients are sufficient, so that the ability of cells to resist pathogens is obviously enhanced. Accelerate human blood circulation and promote tissue metabolism. Promote the increase of athletes' perspiration. A large amount of perspiration can expel some carcinogens such as lead, aluminum, benzene, sulfur, phenol and other toxins and harmful substances from the body. In addition, it can improve the function of human digestive system and absorb more nutrients, which is very beneficial to improve the ability of human body to make white blood cells.

Aerobic exercise can release an endorphin from the body. The substance can make people feel happy, refreshed and happy, regulate the function of brain nervous system, relieve mental stress, and relieve and eliminate negative emotions such as depression, anxiety, sadness and anger. It is helpful to improve the tissue structure of immune cells in vivo, increase the number of cells and obviously enhance the activity of special structures on cell membranes. Receptors are important substances that "capture" the "foreign molecules" such as bacteria and mutated cancer cells flowing in the body and kill them.

Aerobic exercise can also increase the secretion of thymosin, which is called "the clock of human life". Thymus is considered as the central immune organ and an important tissue with immune function. The increase of thymosin enhances the immune activity of immune cells and restores the decreased immune function of the body. Can prevent "muscle hunger". The muscles in all parts of the body lack proper activities for a long time, and the oxygen reserves in their tissues will drop to the bottom, leading to muscle hypoxia, that is, "muscle hunger."

Aerobic exercise can prevent "muscle hunger". Aerobic exercise can promote venous blood return of limbs, effectively exchange gas, and the heart outputs more oxygenated blood through muscles, so that muscles gain more strength, ligament elasticity and joint flexibility, and can reduce muscle atrophy and obesity caused by insufficient exercise.

So aerobic exercise can delay aging.