Fat has many functions.
First, the most common incorrect definition of human body fat related to storage function: "Fat will be burned only after continuous aerobic exercise for more than 30 minutes". I don't know who explicitly put forward this name for what purpose, which really hurt many people. How can a person who hasn't exercised for a long time insist on doing aerobic exercise for 30 minutes? I'm afraid you can't lose weight just by mastering it quickly!
The key function of human body fat is to store the kinetic energy we consume. The kinetic energy of human fat with the same net weight is more than twice that of other nutrients. Therefore, human body fat has always been our body's heat storage. Excuse me, have any of you seen a warehouse that can only enter and exit? At this moment, your body is also burning fat continuously. Human body fat is not only kinetic energy used in times of crisis. In daily life, it is a mixture of human fat and glycogen. Only when the protogen rate of glycogen can't keep up with the consumption rate, the proportion of human fat consumption will increase (such as running and breathing difficulties).
Simply put, the usual calorie consumption also needs a part of adipose tissue to show. If your body fat is too low, you will be hungry faster than ordinary people, and your endurance is obviously not as good as others.
(2) the thickness of human protective layer
The reason why our human body can often survive in today's natural environment is because the human body has a unique protective layer thickness. Our skin tissue and mucous tissue of some human organs help the human body to block gas, bones and muscles help the human body to resist power, while human adipose tissue acts as a buffer layer of the human body, which is equivalent to an automobile airbag in a car.
Below the skin, around the internal organs, around the muscles, are human adipose tissue. In addition to immediate phosphorylation, human adipose tissue will decompose mechanical energy when it is impacted by external force. Therefore, fat people have a strong ability to resist severe blows, and it is normal to play two at a time.
(3) regulating endocrine balance
Although the key function of human adipose tissue is to store and display kinetic energy, it is also a very key endocrine system. The metabolism of insulin glargine, estrogen and various growth hormones all need to be regulated by human adipose tissue, and oleic acid is a part of growth hormone raw materials.
If the body fat is too low, it means that the endocrine system will have a greater probability of imbalance. In the long run, it will have a more prominent adverse effect on the human body. For example, estrogen deficiency affects temperament, adrenaline deficiency, human body's anti-infection ability is reduced, and immune function is reduced.
Therefore, for non-special families (bodybuilders and fitness enthusiasts), it is not necessary to pursue perfection and try to reduce body fat as much as possible. Body fat not only makes you fat, but moderate body fat is the basis of your physical and mental health. Try to keep body fat at a normal level, and 18% is almost the same.