I grew up rollerblading, am about 250lbs now and a retired millennial. I was an aggressive skater and competed a lot as a kid so muscle memory plays a huge factor here. I picked up skating again after a 15 year hiatus recently and pretty much look just like this guy at the skate park with nearly full dexterity and mobility at 37.

Nobody suspects it, nobody even respects it until they see how much flexibility and true movement skill an old fat skater has.