Why do people need to breathe? At that time, because the organism, in order to maintain life, needs to consume a constant stream of energy for the organism to utilize. The process is that the oxygen inhaled by the lungs undergoes an oxidation reaction with nutrients in the body to produce energy for the body to utilize. The waste product of this oxidation reaction, carbon dioxide, is then exhaled through the lungs. We call this process energy metabolism. The level of energy metabolism, depending on the amount of activity (mainly physical) and the level of change, even when people are asleep, due to the heart beat, the respiratory movement of the thorax, the adjustment of the sleeping posture, digestion and absorption of the digestive tract, due to dreaming caused by the brain’s thinking activities, the five senses and the skin’s information-gathering activities, the movement of the cells of various tissues and organs, the metabolism is still going on, only because this time energy consumption The metabolism is still going on, but because the level of energy consumption is very low at this time, the frequency of breathing is very slow and the amplitude is very small. That is to say, at this time, the amount of gas exchange through the lungs per unit of time is the least. When people wake up, with the increasing physical activity (dressing, bedding, washing, meal preparation, eating and morning exercise), energy consumption is also increasing, the frequency and amplitude of respiration is also increasing, that is to say, the number of gas exchanges is also increasing. What does the phenomenon of faster and deeper breathing indicate? It means that the body’s energy consumption level is increasing and the demand for nutrients is increasing. It seems that changes in the level of energy consumption of the body can be observed through changes in the body’s respiration (except in patients with cardiopulmonary failure). After breakfast, people start their own activities, some are in meetings, listening, recording, reading, discussing, playing chess, playing cards, some are doing housework, shopping, watching children, squeezing buses, and some are exercising their physical fitness, dancing, swimming, lifting heavy loads, and so on. They all breathe at different rates and with different amplitudes. The more active they are, the more physical effort they put in, and the colder the environment they are in, the faster and deeper they breathe. According to this reasoning, we should be based on the daily physical effort (respiratory rate) as the basis for eating in moderation, you will be away from the “three high” and other diseases of affluence.