You can try to achieve a look with longer hair so you can cover a bit the temples I dunno....
I'm followin your case cause i'm a very active person too (I surf almost everyday, skate, biking, and I'm doin the courses for sky diving), we should be in contact to share experience.

And forget, try to not stop doing things because of the hair... that's why you're into this!.

Regards and best wishes