Yes, I do this very often, and I call the the same thing! It's most common when I'm looking for something. I'll realize at some point that I'm walking around with my wrists pressed up against my chest. In that situation, I'm usually taking giant steps too, and swinging my head in big arcs looking around. It can also happen when I'm thinking hard, or happy.
I'm tempted to say that it can happen for me during any period of increased energy, concentration or agitation, but that's not quite right. It doesn't happen if I'm doing something highly cognitive like working on math problems. It doesn't happen when I'm writing fiction, but does happen when I'm imagining scenarios. I think it's more likely to happen if I'm cold.
T-rex arms are one of the smaller signs that helped confirm the diagnosis for me. I've seen other autistic people do it as well, with many different symptom profiles. When I was in high school, one kid had autism with significant cognitive deficits; he walked around like this all the time.
I'm careful not to do it in front of others, but if it's just me I don't mind. It feels more - comfortable in a way I can't describe.
HeroOfHyrule wrote:
If I don't have my hands pulled up to my chest I feel like holding my arms rigidly at my side. I know I hear about allistic people not knowing what to do with their hands all the time, but they still seem to handle it a lot better and look more "natural" doing so, and I want to know how they do it. lol
I would hold my arms rigid when walking as a kid until I got in trouble for it. Then I put my hands in my pockets until I got in trouble for that. Now I very deliberately swing them as I walk. I got in trouble for that, too - I guess it's stiff enough to look unnatural - but I didn't care by that point.
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Curious about almost everything. I'm especially interested in chess puzzles (warning: I'm not good at them), writing fiction, and reading scientific journals, particularly articles that I can use to improve myself or my life somehow. PMs welcome.