From the point of view of increasing muscle weight, it will lead to insufficient protein supplement of muscle after exercise, which is not conducive to the recovery and regrowth of muscle fibers.

From the perspective of slimming, it will lead to the decomposition of human muscles after exercise to provide energy for the body, and it is easy to lose muscle. Once the human body muscles are lost, it will not be worth the loss for friends who lose weight.

Muscle is made up of many muscle fibers. The purpose of training is to tear these muscle fibers, and then absorb the intake of protein, and carry out "excessive recovery" to make muscles grow stronger. So no matter how much training, protein's intake is insufficient, and muscles don't have enough nutrition to grow.

Extended data:

Protein is indispensable for bodybuilders and an important energy source. According to a review in American Journal of Clinical Nutrition, supplementing protein in resistance training can greatly improve muscle quality and strength compared with not taking protein.

In the process of fitness, the demand for protein is much stronger than other stages. Protein contains less lysine. If eaten together with foods containing more lysine such as soybeans, meat and eggs, the nutritional value between them will be improved.

Adjusting our previous diet structure, realizing food diversification, balancing coarse grains with flour and rice, reasonably distributing animal protein and properly ingesting bean products in each meal can greatly improve the nutritional value of each meal. In this case, the final result of fitness exercise is that the fitness effect is obviously improved.

References:

Protein _ Baidu encyclopedia? Fitness supplement protein _ People's Network