How I can improve my poses

I always had problems with poses and gesture. I don't think I'm particularly bad on anatomy, but my poses always look pretty stiff and without life. Also it's pretty difficult to me to make new poses from imagination. So I enter in this page to try to practice poses every day and try to be better at drawing poses and gesture, and I would want any critique and or advice to be better at it. I'm struggling with the clases. 

Here are the drawings I made yesterday in the 30 minutes class, they're divided by the amount of time I drawed every pose: 
https://drive.google.com/drive/folders/1MTILCRiX5JOu8MwHi7CkR636b1LjezEB

hi Eli
uhm, generally i think the way to improve that poses from imagination muscle is to actually, create a pose from imagination (i struggle with this, but i do try)

also on your photos, i think your low times are getting good flow and gesture, while your longer times have good proportions to them. maybe you're losing some of the life of the gesture as you start giving yourself more time to get it down ?

Maybe is bc I focus too much in having perfect anatomy 

Next time i'll try having more life and flow in what I draw instead of centering on anatomy

Something I noticed is that your 30 second poses seem to have more flow than the longer timed poses, I would try and look into why that is. maybe it's the lack of time or the lack of care due to the short amount of time spent on the pose so there is less stress. I would try setting up a pose in 30 seconds and then going back and using the rest of the time to refine while keeping the flow of the original sketch/outline. keep it up you're doing amazing!

I think your self-assessment is accurate that the longer drawings feel a bit stiff. Giving the spines a bit more of an S curve and letting that show through the whole torso like the 2nd from the left of your 30 second drawings might help it seems to me.