Bad Joke Theater
As many comics fans know, in Thor's original Marvel incarnation, he had a secret identity as Donald Blake, physician. What many don't know is that, the first few times he transformed back from being the Son of Odin, Blake's muscles ached something fierce. His arms and legs were suffering from the strain of becoming an Asgardian. And for a time, he thought about giving up the life entirely. But as a physician, Blake knew that only continued time wielding Mjolnir would solve his problem.
After all, the best thing for Thor muscles is more of what made them Thor to begin with.
After all, the best thing for Thor muscles is more of what made them Thor to begin with.