Respect for health
If morality requires respect for the life of the body, it does not make it an absolute value.
It rejects a neo-pagan notion that tends to promote the cult of the body, to sacrifice everything for it's sake, to idolize physical perfection and success at sports.
By its selective preference of the strong over the weak, such a conception can lead to the perversion of human relationships.
Source: Catechism of the Catholic Church (Vatican.va)