1, basking in the sun. People with weak constitution should not underestimate the sunshine. Sunshine is a treasure, not only an activator of vitamin D, but also a natural "health medicine". Sunbathing can accelerate blood circulation, promote the production of vitamin D and the absorption of calcium, supplement Yang Qi and healthy qi, and kill many kinds of bacteria and viruses, so sunbathing can enhance immunity and keep fit.

2. Take a walk. Persisting in walking can strengthen metabolism and muscle endurance. Persisting in walking or jogging will increase the blood volume of cardiac contraction, lower blood pressure and improve cardiopulmonary function. Jogging and walking can also relieve mental stress and release negative emotions. Therefore, walking and jogging can enhance physical fitness.

3. Yoga. Yoga can cultivate self-cultivation and calm the heart. Long-term practice of yoga can effectively alleviate the fatigue of human musculoskeletal, promote blood circulation, dredge meridians and qi and blood. Yoga can also shape the body, lose weight and adjust the mood. Therefore, yoga can enhance physical fitness by regulating organs in various parts of the body.