Why do we move in our sleep?

Have you ever woken up and found yourself in a different position than what it was when you fell asleep? Have you ever found your bed sheets, comforters, or blankets on the ground; when you wake up because you kicked them off while you were asleep? Last but not least has anyone ever told you that you move a lot in your sleep? Mason has the same issues. 

From what ive observed. whenever Mason takes his mid-day napes or goes to bed at whatever time his body feels like it we all find him in a weird position.  This is not a bad thing, Every other person has the issue. No need to fear, this is not an issue. Basically, rolling over during sleep for adults and children is simply a matter of getting comfortable. Mason does this all the time. For example, the photo below shows one of his rotations. 

According to Dr Peter Roessler, a fellow of the Australian and New Zealand College of Anaesthetists "We've all experienced this when sitting in one position. We can tolerate it for a certain length of time and then we have to move. I suspect it's probably a similar sort of response even when we are asleep." and this associates with maybe just kicking out a leg, or sometimes, rolling over. 

All in all, I have concluded that the reason that mason moves in his sleep alot is because if his hyperactivity. According to the article that i read, everyone has to move especially when they've been sitting in one position, Mason's inability to sit still is the cause for this. 

"Why Do We Roll over When We're Asleep?" › Ask an Expert (ABC Science). N.p., n.d. Web. 15 Dec. 2014.