People who are prone to acne should avoid sweating too much during exercise and prevent pores from clogging, so that the area of acne will become larger and larger, and the skin should be cleaned in time after exercise. The second is people who are not particularly healthy. They are particularly vulnerable to injuries in sports. If such people often go to fitness, the chances of injury will increase a lot. They must improve the quality of life in peacetime.
Some people are usually under great pressure and busy at work. They usually take time out to exercise. These people should pay special attention, and they must not lower their living standards because of fitness. Obese people are also particularly vulnerable to injuries during exercise. For obese people, exercise must be extra cautious. You can't choose too intense exercise, try to choose a milder exercise method.
The last one is a developing person, usually a teenager. Teenagers' bones are growing. For them, it is not good for their growth and development to keep fit blindly.