A definition of worship as an activity that we practice on a Sunday morning sometime between 9:00am and noon, is pitifully inadequate. Of course, corporate public worship is an important part of our spiritual lives. However, the biblical view of worship is a seven-days-a-week lifestyle activity, rather than requiring but one hour on a Sunday morning. This point is made clearly in Romans 12:1: "Therefore I urge you, brothers, in view of God's mercy, to offer your bodies as living sacrifices, holy and pleasing to God - this is your spiritual act of worship."
We are to worship God and represent Christ all the time in all things. That is, everything in life is to be an act of worship to God. It is a million miles from the religion of "keep Sunday holy and do what you like the rest of the week". The Christian is to please God in everything, by doing it as if for God. That includes sports.
This thought is well encapsulated in the scene from the film Chariots of Fire, when Eric Liddell's thoughts as he runs are, "God made me for a purpose, but he also made me fast and when I run, I feel his pleasure." More and more Christians have come to see sports, played with the right attitude, as something that can bring pleasure to God. It is in fact the hook we often use on the Mission Field.
Those twenty words from Chariots of Fire are very familiar but how many people know how the quotation continues? The full quotation is, "I believe God made me for a purpose - for China - but when I run I feel his pleasure and to give it up would be to hold him in contempt. To win is to honor him." In the second sentence, the idea is that not to use the talent he has been given would be to dishonor God.
Thus the full picture in regards to sports is as part of God's creation, spoiled by sin, redeemed by Christ so that we can worship God in sports as in everything else.