So we do see Matt (ntb) do stuff like casually leap 12' over a stream or accidentally outpace Jay and the cameras in a dead sprint or (famously) beat up two nerds while blind, and it's like. These are unexpected bursts of natural athleticism that speak to a) yes the man himself (irl) keeps fit but also b) here's a man who takes it for granted that his body does as it's told
Here's a man who's never had to think about his body and so he has never thought about his body, it's as much a deliberate choice he's made as well as an entitlement within the hierarchical internal arrangement of himself: his mind as the garden, his body as the thing that tends the garden.
I don't know where I'm going with this exactly, but it makes sense to me that both matt (ntb) and matt (rpf) get struck with disordered eating and passive suicidality. Like it's easy to just find yourself self harming in a body that has never disobeyed you before. It's easy to wish "you'd just die" in a body that is steady as clockwork. Everything you've ever thrown at it, it's just rolled with. You've treated it like an afterthought and it's always just taken care of itself.
It almost feels like a betrayal when it holds you at its mercy.