1, excessive calorie intake. Many people limit their calorie intake too much when exercising, but they don't know that when the body doesn't get enough energy, the muscles will slowly decompose and maintain the basic activities of the body. In addition, the insufficient intake of protein in the diet will also make the muscles not get enough nutritional supplement after exercise and can't be repaired in time, thus accelerating the wear and tear.

2. excessive exercise. Some people try to exercise to lose fat, thinking that the more they exercise, the faster they lose weight and the better their fat-reducing effect. In fact, too much exercise will also consume muscles. There is an amino acid leucine which is very important for human muscle growth. It can prevent muscle decomposition, but excessive exercise will only consume leucine and cause muscle loss.

Generally speaking, the less you practice your muscles, the main problem is that you can't make ends meet, that is, your muscles grow and you don't consume much.

Extended data:

Ways to lose weight without losing muscle:

1, take "aerobic+anaerobic" training, because simple aerobic exercise can not achieve good muscle gain effect, strength training should be carried out 2~3 times a week;

2, add a meal about half an hour after exercise, such as eating an egg or a small portion of peeled chicken breast, in order to better repair muscles.

References:

People's Network-Why do you practice less and less muscles?

? People's Network-Weight loss needs to increase muscle strength training.