Good use of color and the subjects facial expression capture the title nicely. You may want to try using the full 640 pixel size allowed by DPC to get the biggest shot possible. Also, maybe introducing some noise into the shot via photoshop filters or using a higher ISO may add to feel of the pic?
I don't really see how this fits the challenge as I can't see that there is a problem unless i read the title. Another thing i would suggest is making your images a bit bigger.
Perhaps a first challenge?
Getting your submission size up to 640 pixels would be a huge help in your scores.
Regarding this fitting the challenge - pretty weak without the title. Should stand alone and say oops without a title being needed. (5)
Definitely not your workout routine. ;) Nice shot...it's very small though, which will hurt your score. It's also kind of a vague, shoehorned-into-the-challenge kind of shot as well. good luck. :)