Why do our legs shake if we lift our heels whilst sitting down?

Question

Why do our legs shake if we lift our heels whilst sitting down?

In: Biology

Answer 1

I know what you mean. It’s an involuntary ‘quiver’.

I would guess that it’s because the central nervous system isn’t used to controlling the muscles that keep the muscles and feet still when they don’t have the ground underneath them, or that the muscles themselves aren’t used to it.

But I might be way off, so wait for someone who knows the real reason to jump in and correct me 😀