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 mean- they don’t all have good posture. I work with infants and toddlers and some of them are a little wonky out of the gate. 😂

But if I had to guess the answer I’d say it’s bc it requires so much more of their energy and effort to stay upright, so they are engaging their muscles more deliberately. As they get older and sturdier they don’t need to do that as much.