1) has simple requirements for sports venues and can be carried out by stairs with high safety.

(2) The outdoor staircase has a good view, good light and is spacious, so it should be the first choice for the elderly.

(3) Running stairs is a continuous exercise, which does not require special skills. The exercise part is mainly the lower limbs.

(1) Improve cardiovascular function, strengthen myocardium, enhance myocardial contractility and blood supply capacity of coronary artery system.

Good myocardial blood circulation can prevent and treat coronary heart disease.

(2) Improve the elasticity of the great blood vessel wall of lower limbs, enhance the function of venous valve of lower limbs, and have a good preventive and therapeutic effect on varicose veins of lower limbs.

(3) Improve lung function, increase vital capacity, improve lung tissue elasticity, improve lung blood gas exchange efficiency, further improve blood oxygen saturation, and promote systemic metabolism.

(4) Develop muscle strength of lower limbs, strengthen bones, promote bone tissue metabolism and prevent osteoporosis.

(5) Improve the toughness of the soft tissue in the knee joint, and increase the friction resistance and compression resistance of the knee joint surface. Excessive exercise will increase the wear and tear of articular cartilage of knee joint.