Some really great artwork here, Great Job! One thing you may want to think about, just trying to be helpful, is to maybe try practicing doing some really quick, sketchy poses for your characters, to get a really good sense of movement, and then building out the detailed figures off of the those sketches, to try to help you get an even better sense of movement/action in your artwork. It's a constant struggle of mine, but I've found that this sometimes helps me out.
Again, great job, and keep up the great work! Look forward to seeing more of your artwork!