Something rough that I did on a night few days back. Just suddenly felt like drawing something. This was drawn with reference to a picture in Strength Anatomy Training book by Frederic Delavier. It's a great book! Worth getting it for muscle and skeletal reference.
Saw another blog by Riven Phoenix teaching anatomy drawing. Great stuff! Check it out if you can:
http://the-structure-of-man.blogspot.com/
