This can fully mobilize the muscles and nerves of the whole body, reach the state of exercise, improve the metabolic capacity of the body, enhance resistance and prolong life for a long time.

However, the exercise load should not be large. For the elderly, high intensity will damage their health, especially in winter.

In fact, the best fitness time is from 4 pm to 6 pm. The next time, the air has high oxygen content, less harmful factors, and relatively high air humidity and temperature, which is more suitable for fitness. Compared with morning, afternoon is a better exercise time. Everything recovers in the morning, and photosynthesis is not entirely carried out by its plants. There is less oxygen in the air, and the content of harmful gases is relatively high, which is not good for the respiratory system, especially for the elderly.