'Jersey Shore' Cast -- Let's Get Physical!

You need to be in tip-top shape to put on excess amounts of hair gel and fist pump the night away -- so that's why the cast of "Jersey Shore" is going to get their physicals.

Sources tell TMZ that Snooki, Pauly D, The Situation and company will be submitting to full medical check-ups beginning Monday morning -- including breathing tests and a work-up of their family history.

And get this: We're told Angelina knew nothing about any of this. So either MTV doesn't care if she kicks the bucket this season ... or they have no interest in bringing her back.