Health preservation is not starvation, but advocating limiting food intake.

Breaking grain consumes excess nutrients in the body to gain energy. In the early period of Bigu, energy was mainly obtained by consuming excess nutrients in the body or synthesizing nutrients in the body. After the human body enters the dynamic state, in order to maintain the normal consumption of the human body and save lives, it is necessary to consume the nutrients stored in the body.

In cold winter, most people will eat a lot, resulting in overnutrition; Less exercise leads to serious fat accumulation, as well as air pollution, meat and hormones. If it is supplemented in winter, the calories of natural fat will seriously exceed the standard, and a large amount of cholesterol and saturated fatty acid intake will easily lead to various health problems, so winter is suitable for breaking grain and doing health prevention. As a life-prolonging regimen, it is not a hunger strike, let alone a simple hunger strike. Otherwise, it will deviate from the ancient principles of health preservation and damage health.

The practice of breaking grain recorded in ancient books is to avoid or reduce the intake of cereals, meat and other foods, which is actually a health preservation method to improve the diet structure. Scientific health-keeping techniques should pay attention to the diet rules of matching meat and vegetables, conforming to nature, and avoiding reality and being empty. Generally speaking, you should gradually reduce your food intake at first. In order to avoid excessive hunger, eat some liquid food in the middle.

If you don't want to go out for a while, you can resume your normal diet. The key to health care is to limit food intake, and it is not recommended to "completely practice". People with average physique can choose to eat less than one day a week and eat a small amount of high-protein and high-fat food or medicine instead of daily whole grains to nourish qi and blood, such as walnuts, almonds, chestnuts and jujubes.