I am a very still sleeper - left to myself! But both my husband and son are champion sleep wrigglers, they could win gold medals for their fidgeting in their sleep! I find it extraordinary that anyone can move that much and still stay asleep but they both do it and have no recollection of it in the morning...
It makes sleeping with either of them quite a chore for me, as they wake me up with their constant moving. The cat is not quite as bad but he does join in as well sometimes........