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

It’s like this because in the west we all sit in chairs. When I traveled in Asia so so many people sat squatted like babies like it was nothing. They never stopped sitting that way