I'm not an expert, but I also know that reasonable work and rest, good eating habits and proper exercise are the secrets of keeping healthy.

In your case, I think you can go jogging again, two or three times a week, preferably at night. Distance is not the key, just stick to it for more than half an hour at a time. It's best to run in fresh air. You can go swimming if you have the conditions.

If you don't have much time, you can do sit-ups or something in your room and insist on doing more than 30 at a time. If you do more, you can gradually increase the number. If it is a boy, you can do push-ups or something. Of course, this can only strengthen your physique. Personally, I think running and swimming are more effective.

Besides exercise, a good diet (including drinking plenty of water) and proper rest are also closely related, depending on how you arrange it yourself.