Yikes you don't just need the gym you need a spa day too! Hit one fast - have a massage - facial - lunch then go home pop in some ear buds and party by yourself. If he asks what you're doing tell him, he's welcome to join you in your happy place but he's not allowed to poop in the corner... Maybe he'll get the message. He may have had to deal with cancer but he still has a brain and should know better. If he doesn't he needs reminding that you are on his side - not his enemy! Hugs!