There is a reward for those who are humble. Nobody puts this better than King Solomon:
Humility is the fear of the Lord; its wages are riches and honor and life. To fear God is to hate evil.
This is the only time that hate has a positive outcome. When you are humble, fear God, and hate evil, you will be rewarded with riches, honor, and life in this life and the life to come.
Your body is God’s temple and you should treat it with respect and honor. It is a Godly thing to take care of your body because without a functioning body you will not be able to fulfill your assignment.