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 actually more normal to slightly slouch when you’re fully grown. It’s a relaxed posture, constantly being straight up isn’t normal. You’ll even see people who work out have a slight slouch, but stand straight when flexing.

Exaggerated slouching is what’s bad & caused from bad habits & normal things we do in society such as looking down at a desk, looking at our phones, etc.