Poor sleep at night will affect the next day's fitness. Muscle may not be able to recover, and you will feel very tired during fitness. It is recommended to exercise less that day and have a good rest at night. Don't practice hard and blindly pursue sports, which will hurt your health.

Lack of sleep will affect the speed of muscle fiber repair.

Principle of muscle hypertrophy: Because muscle fibers are damaged during training, muscle satellite cells attached around will repair muscle cells, and the repaired parts will be stronger than before.

Muscle fibers are damaged during training, and the work of repairing muscle fibers is carried out at rest. When we rest, the immune system will repair the damaged body during the day. Insufficient sleep, insufficient body repair and insufficient muscle recovery. Either affect the level of your next training, or delay your next training time.

Lack of sleep will promote the body to secrete more cortisol

Briefly explain cortisol:

This is the worst hormone, no one. Cortisol can delay muscle growth. At the same time, it can also destroy body tissues. This high release of cortisol will prolong your best recovery time.

Lack of sleep can inhibit thyroid hormone secretion.

Thyroid hormone enters the metabolism (which is also the reason why hyperthyroidism patients are so thin), which improves the excitement of the nervous system.

I heard that some diet pills still contain this. So if you want to lose weight, please ensure the sleep time and quality ~