exercising causes the body to become stronger & being stronger usually has a positive impact on an organism 's / living thing 's health ->  exercise has a positive impact on a human 's health  poor health / bad health / unhealthy is the opposite of good health / healthy & a health habit is a kind of action that affects health ->  a good health habit causes a living thing to be healthy  exercise has a positive impact on a human 's health & a good health habit causes a living thing to be healthy -> exercising is a good health habit