Get up in the morning and do 20 push-ups and 20 lacing, that is, stand up straight with your hands pointing to the ground. You can't wash your face after bending over. Wash your face with cold water in spring, summer, autumn and winter After school, run at a relaxed pace. Don't run like a sprint. If you still have time, do 20 ups and downs on the horizontal bar and do more in your spare time. Try to sit up straight at noon, go back and wash your face with cold water, and eat 20 push-ups and 20 lacing at night. When you feel that doing these things is not "difficult", then your problem is solved, and then you can increase it appropriately. Don't practice like this. If you practice swimming like that, I suggest that you must resist your coat in winter swimming. I wish you an early and lively life! !