How is physical fatigue? I feel very tired recently.

Physical fatigue is that human cells can't replenish oxygen energy in time, which leads to the lack of motivation for cell processing plants to produce life-sustaining nutrients with high efficiency and high quality. Lack of nutrition and slow metabolism will lead to backache, dizziness, burnout and other fatigue. Sleep problems: Some people often take advantage of sleeping in on weekends, arguing plausibly that this is to save energy. As we all know, staying up late disrupts the biological clock and directly affects the mental state. Psychological problems: Depression is the most common cause of fatigue; If you are in a bad mood and are too nervous, you will also have a bad sleep and cause fatigue. Malnutrition: if the daily diet is mainly processed food, the human body will feel tired. Eat more fresh fruits and vegetables, fish, chicken, whole grains and beans. Excessive use of eyes: if you focus on one thing for too long, the human body will feel loose bones and numb limbs. Better close your eyes for a while. Obesity: Being overweight is a heavy burden on the human body, and excess fat on the body will make people feel tired. Lack of exercise: People mistakenly think that exercise is tiring. But the opposite is true. Without exercise, muscles will become weak, and when the body wants to use them, it needs to spend more effort.