To me, it's a bit too much work on the eyes: there is nothing the eyes a drawn to directly.
There was actually a photo of a similar composition in a canon slr camera catalogue I got last year. I've been trying to find the image online but I just can't find it anywhere but it was of a cross country jogger stepping on a fallen tree trunk as they ran over it. the f-stop was pretty low (around 2.
and the shutter speed was ultra quick so as to get the leg movement looking super sharp. It had a really strong impact on me because it drew me in with such immediacy.
Anyways, it seems that you like the movement in the shot, but how about trying something a bit different with it? Maybe try shooting with a flash on a low power setting to get the close leg looking super sharp, but then extend the shutter speed as to get lots of movement in the background?
just an idea of course