When the supply of glycogen in the muscle is insufficient and the body needs energy, the muscle itself will be decomposed and decomposed to produce energy for the body to use. This is called "eat yourself." There are three major energy supply systems in our body, namely the phosphate source energy supply system, the glycolysis energy supply system, and the aerobic oxidation energy supply system. Among them, the energy providers in the aerobic oxidation energy supply system are carbohydrates, fats and proteins (the main component of muscles is protein). In general, proteins are not decomposed because they are relatively valuable and generate. not easy. However, when the human body is in a state of prolonged hunger, or when training for a long time (more than 90 minutes), at this time, the carbohydrates are gone, the fat is decomposed slowly, and the body has to break down the muscles. The key to this is a hormone called "cortisol." Another point is that testosterone levels are normal for most people, but for people with lower testosterone levels, body muscles are also reduced. In summary: Long-term exercise and starvation (dieting, fasting) will resolve muscles with the participation of cortisol. In addition, a decrease in testosterone levels also reduces muscle mass. Hair Clipper,Professional Men Grooming Product,Portable Baby Hair Clipper,Professional Barber Tools ZHEJIANG SHENGFA ELECTRIC APPLIAMNCES CO.,LTD , https://www.sfelectricappliances.com
One is a fat male with abdomen, abdominal fat will limit the increase of testosterone, resulting in muscle loss; in addition, with the increase of age, male testosterone levels begin to decrease, which is accompanied by muscle loss and osteoporosis.
Under what circumstances does the muscle break down?
Cortisol, which acts as a firefighter, appears when the body consumes almost all of the glycogen in the muscles and does not have time to produce more glycogen for muscle use.
Cortisol converts amino acids (the original use of amino acids into synthetic proteins) into carbohydrates. Not only that, but it also inhibits the level of protein synthesis, which means not only decomposing proteins, but also re-synthesizing proteins.
Therefore, if we want to exercise for a long time, we must be careful, long muscles are not easy, and losing muscles is very simple.