Here are many Bible verses about athletics.

An athlete is not crowned unless he competes according to the rules.- 2 Timothy 2:5

Do you not know that in a race all the runners run, but only one receives the prize? So run that you may obtain it. Every athlete exercises self-control in all things. They do it to receive a perishable wreath, but we an imperishable. So I do not run aimlessly; I do not box as one beating the air. But I discipline my body and keep it under control, lest after preaching to others I myself should be disqualified.- 1 Corinthians 9:24-27

Whatever you do, work heartily, as for the Lord and not for men, knowing that from the Lord you will receive the inheritance as your reward. You are serving the Lord Christ.- Colossians 3:23-24

For while bodily training is of some value, godliness is of value in every way, as it holds promise for the present life and also for the life to come.- 1 Timothy 4:8

So, whether you eat or drink, or whatever you do, do all to the glory of God.- 1 Corinthians 10:31

Or do you not know that your body is a temple of the Holy Spirit within you, whom you have from God? You are not your own, for you were bought with a price. So glorify God in your body.- 1 Corinthians 6:19-20

Blessed is the man who remains steadfast under trial, for when he has stood the test he will receive the crown of life, which God has promised to those who love him.- James 1:12