Can you guess which muscled Hollywood stud this former high schooler morphed into?

Hint: he's got a fitness book coming out today.

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Take a guess!

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It's True Blood and Magic Mike's Joe Manganiello!

Our favorite werewolf's new training and diet guide Evolution hits shelves today!

We're suddenly inspired to go a little harder on the biceps today. Maybe have a protein shake.

(H/T: Towleroad)