I can see some definitive improvement over the set, so all in all you are going in a good direction.
There's a couple of things I noticed:
To add onto what I wrote onto the image: No need to draw in the peak that's produced by the ribcage protruding. In my oppinion that's a detail that's hindering the flow. Nice long lines symbolize the stretching that takes place in that area, contrasted by the pinching on the back.
Also, while blocking out the major shapes is not an error, I personally find that it makes my gestures more stiff.
That being said, gestures are a great place to experiment. Try all kinds of different approaches and find out what works for you.