I've been doing these pages of little action figures for ages. I just never considered them figure study practice until I read some of the books on drawing and illustration I've recently collected. They are considered "thumbnails" and can be developed into more detailed drawings if necessary. The anatomy and proportions don't have to be perfect in these tiny sketches, it's the gesture that counts. You can build the correct anatomy later. Here's a fresh page of them, all drawn from memory. I'm not that bad at drawing human figures.
Pencil on sketchbook paper, about 8" x 10", June 2, 2012.