It should not really come as a surprise...the Leeds armoury did some tests on people wearing armour. They discovered that it is really hard to do any aerobic activity in armour.
Trouble is...how would this test compare to, oh, say, a modern soldier doing the same thing whilst wearing all his kit? THAT might well be a valid comparison. This test merely shows that it is harder to fight while wearing armour than not wearing armour. Well duuuuuhhhhh!
Nice armour though. Wish we could see more of the results.