Eli5: why do babies sit with perfect posture when they learn to sit, but the older you get, the worse it gets?

Question

Babies sit straight up naturally. But the rest of us have to put effort in to having good posture, why?

In: 1304

Answer 1

I think its because when babies are born they’re first becoming aware of their bodies for example learning to hold their heads up or else they will fall over the same goes for sitting up they end up needing to learn to support themselves physically. The older and bigger we get the less we need to support ourselves as our bodies sort of even out if that makes sense. Our heads dont feel bigger than the rest of us (so no real reason to support our bodies with the right posture). Also just general factors such as the work place and how we have to sit / stand for hours, the same with modern technology and sitting at desks ect