looking at your work, it's very polished, especially for gesture drawing. i think you should try working with messier sketching/lineart, it'd grant you more freedom in your poses (a couple in the first image look stiff). with the final drawing, i think adding some basic shading could help it look more alive and more detailed.
Very nice! These drawings have a good flow to them, but some of them seem slick. I'm not sure if you just erased it, but if not, I think you should really start with a line of action for the pose. It might help capture more energy :)
