I used to suffer from Restless Leg Syndrome, which often made me kick my legs while dropping off. As a child I also suffered from fumbling, whilst asleep, with bedclothes (there is a technical term for this, but long forgotten to me), which could lead to waking up with all my covers on the floor.
It appears there's something associated called 'periodic limb movements in sleep (PLMS).'
This article may be helpful. It sounds more like a deficiency than a blood glucose issue.
https://www.nhs.uk/conditions/restless-legs-syndrome/
Hope you get to the bottom of this.
Geoff