Restless Legs Syndrome.

Very lengthy article, just skimmed through the main points, by the title I thought it had to do with people being restless and shaking their legs , which habit I have and I was told it is good for blood circulation and keep you active when you sit for a long period of time...

But this  has to do with a neurological disorder that develops right from childhood where there is unpleasant, throbbing and creeping sensations in your legs ..

Yes. It's a neurological disorder resulting in deprivation of sleep.