Yes you can. Athletic activities have kept many youth out of trouble and found their way. There are people who learned to better themselves spiritually, psychologically and physically playing sports.
And you don't need Trek to teach you all that either.
Playing sports versus watching it is totally different. But I do realize that playing sports can be beneficial. I just don't think that watching sports is all that advantageous. Unless of course you are rooting for your siblings or something (which would be a completely different case).