[Ansteorra] Sleeping sitting up vs lying down

[Cisco Cividanes]

Actually, if no one minds, I would like to expand this topic by a bit.

I was under the impression that the "they were smaller back then" idea 
had been debunked. Though don't ask me where I got this idea from..

What is the current thinking? Do statistics and physical evidence 
support the idea that the average hight of the "medieval" period 
European was less than that of the their modern counterparts?

Ivo Blackhawk.