Reaction: When people are hungry or consume a lot of energy for a long time, the fat in adipose tissue will be mobilized and decomposed into fatty acids and glycerol under the action of enzymes, and then a series of oxidation reactions will occur to generate energy for physical activities. Carbon dioxide and water are mainly excreted through breathing, sweat and urine.

In addition, most foods contain seven nutrients (sugar, fat, protein, water, carbohydrates, starch, minerals). The energy generated by digestion and absorption of these nutrients through the gastrointestinal tract can help the human body to develop and maintain healthy vitality, according to the "law of eternal energy".

The energy produced by the digestion of sugar, fat and protein in the seven nutrients in the human body will not be eliminated automatically, and can only be exhausted after the cells are burned. If it is not burned by cells, the remaining energy in the human body will be converted into fatty acids after being dominated by insulin.

Fatty acids flow in blood or are stored in fat cells, and the ratio of fatty acids to triglycerides is 3∶ 1, which can be stored in 80% to 95% of the space in fat cells. Unlike fatty acids, triglycerides stored in fat cells can't enter and leave fat cells at any time, and they cling to fat cells and refuse to leave easily, leading to fat cells hypertrophy and obesity.

Extended data:

Accelerate fat consumption: do more aerobic exercise. Anaerobic exercise can shape. Although anaerobic exercise can't burn fat directly, it can shape muscle lines and improve the ratio of fat to muscle. Muscle growth will be more linear, and it will give people a sense of seedling, which can be called "visual slimming".

Aerobic exercise is an index to measure heart rate: exercise with a heart rate of 150 beats/min is aerobic exercise.

Features: low intensity, rhythm and long duration.

Requirements for burning fat: the exercise time should not be less than 1 hour, 3 ~ 5 times a week.

Recommended exercise: jogging, cycling.

People's Network-How is fat burned and consumed? Grasp the three best time periods for reducing fat.