I was very very physically sick in high school. At the point I still attended school, I was so weak that I could not bench press the *bar* with no weights on it. It weighed seven pounds. I was and am 6'4" (1.93 metres).
Some sports I played aggressively to the point that it frightened people. Football and baseball I went all out, I knew that I was frail. I was unafraid of injuring myself, my primary concern since childhood (I grew up very fast) was injuring other people when I played. With this fear removed, I was free to let loose in a truly primal way. Once, in basketball, I tried this against a guy who is now on a scholarship for the same sport. I literally *bounced* off of him.
Other sports, like dodge ball, I found no appeal in... probably because I sucked at them. While I am not dyspraxic the question has been raised before. I decided to simply not participate at all during these days.
I remember, one memorable time, when the self worshiping prick of a coach (teacher??) told me, and this is an honest quote: "If I see you reading one more time I am going to have you suspended!"
Apparently, running in circles around the gym is much more important then reading 600+ page nonfiction books to someone with a blood iron level of 5.8 (sorry, I forget which units).