Yo yo, here we go! I really liked the pose of this pic I stumbled upon (and by "pose" I mean smokin' hot workout babe), and immediately wanted to draw it. (and by "draw" I mean... never mind) I roughed it out loose and quick, trying to find what the shapes were and where the balance in the body was. That went fairly well but had the usual oddities.
Next step was to refine things, half looking at the pic, half not. Eventually I find you need to turn the pic away or the drawing becomes too awkward a representation-- and I'm not saying the finished version doesn't lean that way, but it was a fun exercise.