A, aerobic and anaerobic metabolic exercise Any exercise process of the body for energy supply consists of anaerobic and aerobic metabolic processes in different proportions. The main difference lies in the different pathways of energy metabolism during exercise. Divided into aerobic metabolism and anaerobic metabolism two. Metabolic processes determine the size of the exercise capacity. Aerobic metabolism of exercise: also known as aerobic exercise. The only three substances that can supply energy in the organism are sugar, fat and protein, which require oxygen for decomposition and are known as oxidation. By relying on glycogen, fat and protein decomposition aerobic metabolism to supply energy. Aerobic exercise is low-intensity or moderate-intensity exercise. Exercise can get sufficient oxygen supply, sugar can be completely broken down into carbon dioxide and water and release a lot of energy, so the exercise can last a long time, also known as endurance exercise. Aerobic exercise metabolism is characterized by low intensity and can continue to be active for a longer period of time, in fact, it is repeated several times of small and medium intensity exercise, such as walking, jogging, running, cycling, climbing, stairs, swimming, dancing, tai chi and some small ball activity projects and so on, the trainer can choose according to their own situation and interest. Aerobic exercise is commonly used internationally as the main method of coronary heart disease rehabilitation. Anaerobic metabolic exercise: also called anaerobic exercise. The organism needs a lot of oxygen for sugar oxidation and energy release in a short period of time for a very intense exercise. However, it is impossible for the body to provide sufficient oxygen in a short period of time to help the complete decomposition of sugar into carbon dioxide and water, so the exercise is metabolized under hypoxia, and the body is re-synthesized through anaerobic glycolysis, which forms lactic acid, and the accumulation of lactic acid leads to muscle fatigue and a rapid decline in exercise capacity. Anaerobic exercise is characterized by high exercise intensity and can only last for a short period of time, requiring a longer rest before the next activity can be performed. Anaerobic exercise such as sprinting, weight lifting, stairs, etc., can last about 30 seconds. Generally, people go up 3-4 floors with little reaction, and when they go up to 5 or 6 floors or higher, they will feel out of breath, sore legs and need to rest. Anaerobic exercise lasts for a shorter period of time, at most 3-5 minutes. Second, the importance of aerobic exercise exercise for the elderly Aerobic exercise refers to exercise when the body’s metabolism is based on aerobic metabolism. Aerobic exercise relies on glycogen and fat decomposition and oxidation metabolism for energy supply, this form of endurance exercise training can enhance respiratory and cardiovascular function, improve the metabolic function of the human body, and has a greater impact on the development of heart and lung function of the elderly. For the elderly, the basic physical quality should include: whole body endurance, strength, flexibility, sensitivity, coordination, balance and so on. With such basic physical qualities, they can safely and effectively adapt to daily life and work, as well as cope with unexpected accidents. Scientifically aerobic exercise is the most effective and suitable for sports exercise mode. In addition, aerobic exercise plays an important role in preventing hypertension, abnormal lipid metabolism, abnormal glucose tolerance, the occurrence of obesity, preventing osteoporosis, delaying aging, and improving the quality of life.