Hello, first of all, these are great! i can really tell u are getting better and honestly for 1 minute studies these are great.
What i see you can improve for having more loose & dynamic poses:
You might need to exaggerate the lines more; make them more curved and long. exaggerate the poses,take it a little bit more further of what you see in the image. It`s all about intent.
A very good resource that has worked really well for me is Michael Hamptons "figure drawing design and invention" book, he has a brief breakdown of gestures in the beggining of his book and much more content about anatomy and how to simplify it.
I see you putting much effort in the exact form of the body, but i dont think that is needed to convey dynamic poses of 1 min sketch, what do i mean by this is if you just simplify it even more, use less lines, make them more curvy and long, it will look much better and not only it will be more efficient; in the long run, when you figure out how to simplify it even more, it will make it more dynamic and powerful. Of course this is only refering to very short studies, when u have more time you can and should build up the body more.
I totally see u are trying to do that in these too, its just a matter of exaggerating the lines more. Hope this helps in any way or form! Keep it up
Thank you! I will look into that book you mentioned, and I'll try keep exaggeration and simple lines in mind when I'm doing my practice. I feel as if I tend to get a bit sloppy when it comes to doing the limbs, as I try to get the whole form of the anatomy, and it can come out looking very messy when it's done so quick. I'll keep at it! Thanks again!