I just found a great blog. One of Painting/Drawing's visitors, Riven Phoenix, has a great blog on how to draw comic book style action anatomy. The best part? Each blog has a mini video that demonstrates the lesson.
I think this is a fabulous resource for people that want to learn how to draw the human form, comic book style or not.
Check it out at: http://the-structure-of-man.blogspot.com.
Alina