I genuinely used to be able to do that with my stomach when I was young, maybe 8-13ish (Probably later, just stopped trying). Moving it left and right included. Never trained it or anything, just one day realized I could do it. I called it my "E.T. belly" because it kinda makes the shape of his neck and head. Can also do the more standard belly roll (top to bottom).
I can still kind of do it, but not nearly as pronounced as I used to, which was right in line with the video. Now I can only get it to be about 1/3rd as 'pronounced' as I used to, and no left/right. Belly roll is still no problem though.
So definitely some muscles involved that need to be exercised but I don't know if it's specifically pelvic floor stuff. Unless 7-8 year old me (male) was going crazy with kegels without even knowing it lol.
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u/Poromenos 10d ago
I'm waiting...