AITAH for saying that my girlfriend needed to get in shape too if she expected it from me.

I’m 32 now. In university I was a Div. 1 swimmer. I almost mad the Olympics. I’m not bragging this is relevant. Obviously at that level of competition I was incredibly fit. I still swim for exercise but it would be a lie to say I’m in top condition. I have a lot of other things going on.
My girlfriend of three years is beautiful. She is a teacher and her hobbies are all pretty sedentary. She walks her dog twice a day and that is her physical activity.
Lately one of her friends started dating a personal trainer. This guy has a six-pack and looks like Jean Claude Van Damme. If I’m being honest his physique is better than mine was. But I wasn’t training for looks. I was training for speed.
My girlfriend has been saying that I should get back in shape so she can show me off. It was kind of annoying. I’m a professional. Once again not bragging just stating facts. I have a career I enjoy that allows me to enjoy life at a pretty great level. Every year I take two vacations to different countries on my bucket list. I’m debt free. I don’t have time to eat ten thousand calories a day and train five hours a day.
I laughed it off to begin with but I explained to her what I just explained to you. She seemed to understand but then she started again. So I told her that if she wanted me to “get back in shape” then she had to ask well. That she needed to get to 20% body fat like runway models. I said that she was beautiful but had no stamina or strength.
She is now saying I’m an asshole for only considering her looks. I think that’s pretty fucking ironic. I’m in great shape for my age and still enjoy stuff like snowboarding and surfing. I will also admit here that I’m not particularly good looking. I look kind of like Walter White’s old business partner.
I think that if she wants that from me it’s not too much to expect the same from her.