Your body and your spirit aren’t divorced from each other, so your Catholic faith and your fitness shouldn’t be either.
CCC 364: Explains that the human body shares in the dignity of the “image of God” because it is animated by a spiritual soul. It explicitly states: “Man, though made of body and soul, is a unity.”
If it’s in the catechism, it’s good enough for me.
Unite your fitness and your faith today.