In winter, especially in the north, you shouldn't go out to exercise. For example, in places with severe smog, such as Shijiazhuang in Hebei or Beijing, if you do a lot of outdoor sports, you will only absorb more toxic gases, which is not good for your health at all.

And don't exercise in the morning, because the smog in the morning is the most serious and harmful. If you want to exercise in the morning, you can practice yoga indoors and do stretching exercises, or if there is enough space, you can jump rope or turn a little hula hoop. Such aerobic exercise is also good for your health.

If you want to exercise without harming your health, you must make preparations. Don't underestimate these simple movements of twisting your wrist and turning your ankle. This kind of action is actually telling the body to be prepared so that the sprain will not be particularly severe.

If you are doing fitness exercise, you should follow the coach's instructions step by step, because fitness is not as casual as normal exercise, and fitness requires high accuracy of the body.