And let us not forget the smell...it wasn't like these suits were built with trapdoors for #2! lol
Since I wear armor, this isn't news to me- still, an interesting study in that they took the time to do it. I think that their results will be somewhat skewed as I am sure most of their volunteers, if not all, have had very little time to learn about armor, or train in it sufficiently so as to mimic what a medieval knight's results would've been.
Do you all remember the article from across the pond where they'd found the burial site of a medieval knight and based on tests run on the skeleton they were able to deduce that this man was of middling height, heavily muscled and bore the signs of old wounds on various parts of the body? Granted, armor can eat up huge chunks of endurance, especially for the likes of us, who aren't tasked with living as a knight full time...but those guys I believe were stronger, more durable- if only because they had to be.