Beautiful work first of all, With complicated motions like this I highly recommend you visualise weight as the real protagonist of it. Think about what you naturally should stabilise in your body in order to lift push or pull the object. It seems also have picked a very tricky pose as you chose to have the hips point forward which creates a bit of awkwardness. If I was to start over I would push the hips completely side ways on the push motion or the "Resting" position after the motion I hope this helped | Artwod Feedback