The first sketch was drawn from a photo, with as little distortion to the proportions as I could muster, and the second was constructed from what I guessed the muscles would look like based on the anatomy illustrations in Anatomy for the Artist, by Jeno Barcsay.
There are, without a doubt, some inaccuracies in the muscle construction (for one, the abdominal area was pretty rushed), but drawing this has forced me to pay attention to things I’d never even noticed before. So, all in all, I’d call this exercise a success. I’m looking forward to doing some more poses.
The final, skeletal, stage is still in the works.