I second Raimius; work on getting a sport. At USAFA, everyone does sports, either intramural or intercollegiate. Since you said you run a lot anyway, join the track and cross coutnry teams. Ideally, get on the team at your high school. If that doesn't work, try for a civic one, like a running or mountain/road biking club.
By the way, there is no point to accepting what you already know will be a negative on your application when you can change it; if you really want something (i.e. to go to the Academy), take action now to do what you need to in order to get it.