[Serendipitous]

Hard to believe. If you buy and furniture more than 50 years old it's all smaller - chairs, tables, beds.. everything. Pretty sure they didn't do that to conserve heat.
It's more likely the people they examined were wealthy and lived more comfortable and healthy lives than the average person.

[SunkenCiv]

I grew up in a house where most of the furniture was more than 50 years old, and none of it was any different in size than today's.

[lizma]

Ever see Abraham Lincoln's bed at his home in Springfield? It's tiny and he sure wasn't. It may have been what was fashionable at the time.

I was always a little confused when I heard that medieval people were so small cuz I've seen many suits of armor over the years and much of it looked bigger than me (5'6"). But your right. I suspect guys that owned armor probably grew up well fed.