Otherwise you do without it most of the time. But prayer isn't a sport. As soon as I've said that I'm in trouble because so many sports have become professional and as such are almost wholly indistinguishable from work. I could say that work is something you have to decide to do, you have to allow time for, you have to go at with energy, skill and concentration. But all those things could be said of the big business which is sports.
Competition is deadly, equipment highly technical and expensive, salaries absurdly high.
But prayer is no game. It's not likely you'll get any credit at all. It's a matter of need and responsibility. He can't live a Christian life at all if he doesn't pray. Prayer is the opposite of leisure.