Rock climbing is hard! If you don't have any arm muscles. Actually, that is pretty rare, I'm sure I have some sort of muscles in there somewhere, but I don't think I've ever used them before. They were in hiding.
Henry Yan is coming to Columbus in August to give a workshop on long and short pose charcoal figure drawing (one of my favorite mediums and subjects)! I'd definitely go if I had the funds:
Check out his website, amazing stuff: http://henryyanart.com/