It is a good start! What I've found is, aside from reading up on masters' works and such, is getting some health or muscle magazines. The men and women in those are, while 'ultra hard' most times, ideal for comic book anatomy practice. You can find out just exactly where those muscles are, and how they act when under stress (lifting versus lounging).
Thank you for sharing that!
And he SHOULD be out rippin into enemies nekkid. 
More people should. At least, in Paragon.
Please read my FEAR/Portal/HalfLife Fan Fiction!
Repurposed
Thanks Zekiran! If only fitness magazines were legal here. Or art.
Saudi Arabia. I am American though. Long story. I have a journal entry about it in Deviantart here if you are really interested.
I could get arrested for drawing naked people. Or women in revealing outfits. But I doubt it. Anyway, I can still find all that stuff online. If I abruptly stop posting you will know they caught me.
I recently have been looking at drawings of the old masters (Da Vinci, Michelangelo to name a few). You can learn a lot just by looking at them and I had a magazine which dissected a lot of them. So I was inspired to draw. A nude male of course. I tried to emulate their style as best I could. I still kept a comic book style pose though.
While it doesn't show anything it is a nude so it is probably best not viewed at work. It's my main character, Blood Wolffe NSFW. Not quite as good as the drawings I was inspired by, but it's a start.