he should not be upset that you don't want to run in place in front of him naked. I don't really understand his request but whatever. I don't know many people no matter what size or shape who would like to do that either.

The fact that he got upset over you not doing it exactly the way he prefer, you were still willing to try. Honestly that's more than I would be willing to do. Cause it seems a bit strange, and I wouldn't feel comfortable being on show on demand like that. I understand people like different things, but it kinda doesn't sound like he understands that.

jumping jacks nude? why? are you just supposed to do every thing nude, or is this his thing? Either way, he needs to think about your needs and feelings as well in the nudity issue.

Maybe you can talk to him about why you should be doing these things in the first place? And keep doing what you are comfortable with. It's your body, and like you said you are making progress. I hope you find more self love and confidence. I am sure what he see's in you he see's for a reason, you just gotta believe it about yourself too. Yes harder done then said.

But don't be pressured into giving more than you can or want to.