Decomposition of fat. Fat is stored in human fat cells in the form of triglycerides. If fat is to be metabolized, it must first be decomposed into fatty acids, which requires the participation of enzymes. Therefore, in terms of decomposition, the activity of enzymes that promote lipolysis is the key to lipolysis. The activity of this enzyme is related to insulin, triglyceride content in blood and adrenaline. The higher the insulin content, the lower the enzyme activity and the slower the fat decomposition. The more triglycerides in the blood, the lower the enzyme activity and the slower the fat decomposition. The lower the adrenaline content, the lower the enzyme activity and the slower the fat decomposition. So the key to fat decomposition becomes three factors: insulin content (related to blood sugar), triglyceride content in blood (related to fat intake) and adrenaline content (related to exercise). What can we do? ① Control insulin content. Practice: Eat less foods with low glycemic index (to prevent blood sugar from rising too fast and insulin from soaring), take protein in balance with fat and carbohydrate (to prevent blood sugar from rising too fast) and control blood lipid content. Practice: Eat a reasonable amount of fat. ③ Increase the content of adrenaline. Exercise: Cardiopulmonary training and resistance training. ② Transportation of fat. After fat becomes fatty acid in fat cells, it will pass through capillaries, reach large blood vessels through blood circulation and be transported to liver or muscle cells. There are two key points in this link of fat transport: ① Capillary density. The greater the capillary density, the faster the fatty acid transport. ② Blood flow velocity. The faster the blood flow, the faster the fatty acid transport. What can we do? ① Increase capillary density. Practice: cardiopulmonary training. ② Increase blood flow velocity. Practice: cardiopulmonary training. ③ fatty acid decomposition. After being transported to liver cells or muscle cells, fat will first enter the cytosol, and then be transported to mitochondria (requiring oxygen) under the catalysis of an enzyme in the cytosol to be completely oxidized. Therefore, the key of fatty acid decomposition ① The activity of enzyme depends on the level of raw sugar water and aerobic capacity. The lower the glycogen level, the higher the enzyme activity. The stronger the aerobic capacity, the higher the enzyme activity. ② Mitochondrial density. ③ The speed at which oxygen enters cells (aerobic capacity). What can we do? ① When training for the purpose of reducing fat, don't ingest sugar during the training. Cardiopulmonary training. ② Cardiopulmonary training. ③ Cardiopulmonary training. Sum up: sum up everything we can do. What is the key to reducing fat? ① Diet 1: Eat food with low GI value. Two: eat less and eat more. Three: Reasonable intake of fat, protein, and balanced diet of carbohydrates. ② Training 1: Cardiopulmonary training. Two: resistance training.