Oddgirlout and ChaoticMinds re exercise and diet...
I've had many failed attempts at losing weight, really hard to say how much of that, if any, is ASD related, as it's difficult for everyone. I think some of my food issues didn't help - for me it's mostly about routine, having the same breakfast and lunch every day, etc, so I really don't want to eat special foods or recipes for weight loss. I've lost quite a bit of weight recently just by cutting down on the amount i eat but eating exactly the same foods as normal. I now eat about two thirds of what I used to and I'm quite obsessive about the size of the food portion on the plate & knowing how much space the blob of food needs to take up. Not sure if that's a very healthy attitude mentally, but it has helped me lose weight in a way that seemed to work with ASD.
Regarding exercise, I'm wondering if this is something others find, that I only really exercise if it becomes a special interest. E.g. I get really obsessed with reading books about running and learning the best training methods and looking at my parkrun stats, or I'm drawing diagrams of all the yoga poses and memorising all the English and Sanskrit (?) names. The problem is then I lose interest after a few months and sit on the sofa doing nothing active for ages, which doesn't help with anxiety and depression. I do walk, but even then I'll link it in with a special interest e.g. for a while it was local history and I was going round ticking off different buildings I'd seen in historical photos and taking photos from the same angle of how they look now.
I just don't seem to be able to motivate myself to do exercise long term without that side to it - which is ok as long as it lasts but not healthy when I'm doing nothing. I wish I could make it into part of my daily routine, because I do have some routines I'm very rigid about, but it doesn't seem to work with exercise. Has anyone else found this?