Life Drawing Sketch Dump

I've been really trying to work on my figure drawing.  Aside from improving my general anatomy and figure drawing skills, ultimately I want to be able to quickly and successfully draw posed figures from imagination.

Here's a sketch dump of some sessions from this great website.  Most of the figures here have been drawn in 30 seconds/1 minute stints, however there are some 5 minute/15 minute ones in there too. 

Apologies for the terrible quality of my scanner/the super sketchy drawings.  Although some of these are kinda dire, I do feel like I'm improving and the 30 second figure sessions are really helping me speed up at sketching the human form as a whole in shorter periods of time.