This picture captures the essence of a true runner. Reminds me of my old running days. Nothing but wind and the smell of the turf to keep me happy. Great Picture!
Nice color but a little over saturated and over sharpened. I like the depth of field and the composition. One thing to try would be to eliminate the green background by raising the camera angle and shooting down on the shoes. Also possibly using a diffuser on the left side to even out the light.