Good use of "flow lines" (don't know if that's the right term) to make each part flow into one another (there's even bits where it looks like it's wrapping around the form). Also, nice use of a main flow line to indicate the direction of the pose. If I may, I'm not an expert, but if this can help, an information you can add to your sketches is more line weight on portions of the pose where more tension and weight is applied on the body. This element (and so much more) was shown by artist Mike Matessi with his "force" technique, where you sketch a gesture fast while conveying information about the pose like weight, balance, structure of the body and some more points that escape me for the moment. That being said, you did very good!