You can reply directly, any way of keeping in good health depends on your own exercise. If you don't exercise, any regimen is useless. Therefore, health care should start with exercise. When others say the way of keeping in good health, you must explain the truth to others according to your own point of view or ability. Only in this way can the two sides benefit each other and the communication between the two people will be more pleasant. This is the real feeling of being friends, thinking of each other.