"I jump into a sand pit for a living"
It is good!
In the beginning God created the heavens and the earth and God saw that it was good (Genesis 1:1, 10)
Many of us were brought up to believe a kind of dualism - the belief that spirit (or reason) is inherently good and matter inherently evil. We think that an imaginary line may be drawn. All the important things about being a Christian, reading your Bible, praying and worshipping God, being faithful to your church, are above the line. They are good. Below the line is everything else that isn't spiritual - having a laugh with your mates, playing sport, the arts, music, going out for dinner, sex, watching TV are things people tend to consider "unspiritual".
Genesis 1 rules out this kind of dualism. Everything that exists is created by God and is, in itself, good. Of course how we use God's creation and how we act may please God or displease him.
Genesis 1 tells us several times that God saw that it [what he had created] was good. The thought is repeated in 1 Timothy 4:4, "For everything God created is good and nothing is to be rejected if it is received with thanksgiving." God's creation is good and it is to be enjoyed. The material world matters and it is OK to enjoy it. We are not to feel guilty when we enjoy the physical or material, thinking that we should really be more spiritual. For us that includes sport.
Let us thank God for sport and get on the field/court/track and enjoy it.