Level 0: no feeling, no fatigue, gentle breathing and rest.

1 grade: very weak, without any fatigue, breathing gently, reading state.

Grade 2: weak, without any fatigue, breathing gently and dressed neatly.

Level 3: mild, without any fatigue, breathing slowly and naturally, walking from the bedroom to the living room.

Exercise intensity has a great stimulating effect on human body. Proper exercise intensity can effectively promote the improvement of physical function and enhance physical fitness. If the intensity is too high, it will exceed the body's bearing capacity, which will reduce the body's function and even damage health.

Exercise intensity and fitness effect;

Exercise can promote heart and respiratory function, increase muscle strength and bone density, improve reaction sensitivity, reduce depression, and thus enhance physical fitness. So many people think that increasing the intensity and duration of exercise will be more conducive to health and longevity, which is actually unscientific.

Generally speaking, strenuous exercise is not good for your health. Physiologists have conducted two studies:

Firstly, compare the effects of low-intensity and high-intensity exercise on human cardiovascular system.

The second is to measure the changes of blood pressure and heart rate during continuous exercise and intermittent exercise.

China scholars have found that playing Tai Ji Chuan for 30 minutes every day can significantly increase the level of high-density lipoprotein in the body after one month. This lipoprotein can eliminate the low-density lipoprotein deposited on the arterial wall, which is beneficial to the prevention and treatment of arteriosclerosis and cardiovascular diseases. Therefore, low-intensity exercise is good for health.