Made from a (possible knockoff) Hasbro X-Force Deadpool.
The head is a cast bought on ebay. I've tried using the magnet technique to attach the head to the body.
The weights are made from an Arkham Origins Deathstroke stick and some foam I found.

Below all of that armor and his iconic costume, Deadpool is one slim dude. So he has to work hard to get in shape. Resulting in a very sweaty Deadpool.
However, with those shorts the ladies at the gym aren't very impressed...