These are super good. My only suggestion is that for the joints facing us, be mindful of how open your circles are. It's kind of hard to tell what's going on in the second from the top image. If that joint was that open towards us, the entire foot would most likely be closer to the viewer and not bent. In fact, the bottom of the foot would fully be facing the camera.
Allo
First of all, good job with your gesture and good to notice that you are having fun with gesture.
If I do have one word on your gesture drawing, I think you are trying to get every detail of the pose which is good but not the main point of gesture drawing. Like @snakker said, try to find interest/strong/elegant lines that DEFINE the pose/action itself.
Another minor stuff to say which I also suffer atm is line economy as it looks like you scribbling. Unless it's what you want it that way, it's preferable to keep a clean line economy (e.g. max 10 lines for 30 sec gesture) and just worry about key line.
But looks good so far and good luck!