1, through physical exercise, excess fat is converted into energy and consumed, and the fat volume becomes smaller and the weight becomes lighter.

2, fitness will increase the body muscle volume and reduce fat. The volume ratio of muscle and fat with the same mass is 1:4, so even if the weight remains the same or even rises, people will become thinner and thinner because of the increase of muscle and the decrease of fat.

Extended data:

Arranging the amount of exercise is one of the key links of scientific exercise. Facts have proved that it is better for thin people to do aerobic exercise with moderate exercise (heart rate is 130- 160 times per minute) and moderate load (50% to 80% of the maximum muscle strength) is better.

In terms of work and rest time, you might as well practice three times a week (1 every other day), from 1 to 1 half an hour each time. Practice 8- 10 movements at a time, with 3 to 4 groups for each movement. Practice: shrink quickly, pause slightly, and stretch slowly. It takes about 60 seconds to perform a group of actions continuously, with an interval of 20 to 60 seconds between groups, and each action interval is 1 to 2 minutes.

Under normal circumstances, each group should be able to complete 8- 15 times in a row. If the number of times in each group is less than 8 times, the weight can be reduced appropriately; Coupled with the last two movements that must be done with all one's strength, the muscle tissue is deeply stimulated, and the "excessive recovery" is remarkable, and the exercise effect is excellent.

References:

Baidu Encyclopedia: Fitness