Keeping in mind that body image really is all relative, I'm more concerned that the management seems to be asking all of you to conform to what could be construed an unhealthy standard for some of you.
Some people are genetically tall, thin, and gorgeous. Barbie-shaped. Others of us are Weeble-shaped. Some are super fit, some are working toward that. And there are a whole lot of people in between.
I have two cousins who are both naturally thin and superfit - they both work really hard at it, but it does come more naturally to them than others of us with whom they share a gene pool. (There are eight cousins all together.) One is a marathoner and went to college and grad school on diving scholarships, the other went to college on softball and volleyball scholarships and won national physical fitness competitions and is now an internationally-recognized athletic entertainment superstar.
They both have breast implants.
I told them it was like gluing sequins on a butterfly, but they did it anyway. (Not that my opinion ever held any sway with either of them.)
My point is even the naturally gorgeous who fall into that 2% of the population who meet the Ideal Standard of Beauty have body image issues. I think you should ask your gym management for more specific guidelines - what do they want to focus on, fitness or cuteness? Are they into actual heath or is image more important? I think if management's focus is healthy fitness (which for many people means they're also thin), having a dress code that makes sense for the class you're teaching is a reasonable request. I don't think anyone can require you to wear makeup or weigh a particular weight, unless they've made a certain Barbie-like image part of their company's brand, like Hooters where servers have to be a C-cup (is that still true or have they been sued yet?).
Even Weeble-shaped, I feel so much better about myself today than I did when I was 18 and 130 pounds in college, and living on Diet Coke and Hershey bars and not a lot of sleep. I would never have dreamed of riding a bike 50 miles, or swimming laps for an hour, although I did attempt a 10k when I was about 24 - I had to walk most of it, but I finished. And I would never, ever have harbored secret fantasies of Kona.
If you're doing all the exercise right, and with that many classes, I don't see how you're not, I wonder if tweaking the quality of the calories-in could help with the weight you've gained since the accident. Maybe up the protein and cut out bread or something - you just hinted at making less-than-good-for-you choices on your breaks, but didn't get specific, and I hate it when people presume things about my diet, so I don't want to do that with you.
Did you post a follow-up to your accident report? How did all of that turn out? I hope you sued the dog-owner for reckless endangerment and got them to pay your medical bills at the very least, and buy you a new bike and kit.
Roxy
Getting in touch with my inner try-athlete.