An hour in the morning is worth two in the evening. The advantage of morning exercise is that the air quality is good, the environment is relatively quiet, and people's mood will naturally be much more cheerful. Absorbing more fresh air helps to speed up metabolism and delay aging time, so many retired people like to get up early in the morning to exercise. You can choose jogging, Tai Chi and square dance for morning exercises. Summer and autumn morning exercises should pay attention to replenish water, and winter morning exercises should pay attention to wearing clothes to prevent cold.