A lot of time is spent on running - and besided just running, there's the use of stamina, if either or both of these could contribute to (very slow) (but existant) skill gains that would make sense realistically. ex: running should increase athletics, speed, flexibility if you compare it to real life.. just a suggestion, nothing big, something small that adds up.
another suggestion that may not be useful: add skill "jumping" to jump higher, or have athletics skill to effect how high/or far an avatar can jump.
The Allfather
