I think you'd better start exercising now, because exercise can not only strengthen your body, but also shape your figure. In addition, if you want to pass the physical education senior high school entrance examination, you should run on the plastic track to practice endurance, or run a few laps every day, and then strengthen the training volume according to your own situation. Be careful not to exercise forcibly, or you may get hurt. You may be tired at first, and your legs will hurt the next day, but you won't if you exercise more. You can also do some exercises according to the content of the physical education entrance examination.