Just like you, I'm a fan of bodybuilding, working out, dieting, and keeping healthy; and even though Jersey Shore is not one of my favorite shows, I admire the fact that the guys and girls maintain some pretty awesome bodies. Talking about awesome bodies.... Jenni "Jwoww" is still my favorite, and to answer your question; this season 5 is gonna have the same cast: Ronnie, Vinny, Pauly D, Deena, Nicole "Snooky," Mike "The Situation," and Sammi.
I guess that by watching the show I will be able to see if they have been doing their steroid cycles correctly and continue doing their GTL.
They have a video on the MTV website, but to save you time I just embedded it in this post.
Here you go:
Jersey Shore (Season 5) | Trailer --- CLICK ON "READ MORE" below