Sound bodies enhance the soundness of our minds. We are fundamentally physical-spiritual in nature, and to be fully human we must cultivate the health of both.
The significance of bodily exercise was not lost on the Apostle Paul, who used athletic competition as a metaphor for the Christian life:
Do you not know that in a race all the runners run, but only one gets the prize? Run in such a way as to get the prize. Everyone who competes in the games goes into strict training. They do it to get a crown that will not last; but we do it to get a crown that will last forever. (1 Corinthians 9:24-25)
The Heidelberg Catechism teaches that we “belong body and soul … to our faithful Savior, Jesus Christ.” Therefore we seek to honor our Savior by our use of our bodies, that our both our academics and our athletic competition might be pleasing in his sight.