Clint_L
Legend
Not that D&D needs to reflect real life, but this is just not true. Or, it's sort of true but only half the story.Except that
A.) heavy armor isn’t actually very restrictive of movement in real life, and
What is true is that the restrictiveness of heavy armour has tended to be overstated. Obviously, armour like tournament plate was extremely restrictive but it was built for a specific, largely artificial combat purpose. Other forms of heavy armour, like chain or the type of plate actually worn in a real battle, allowed more freedom that is popularly supposed, but we don't want to over correct to suggesting that they weren't tiring and didn't impede movement, because they were and they did, primarily through the extra cost they imposed. Well designed plate allowed a pretty full range of movement but at the cost of a lot of extra effort.
Which is to say that you would not want to try to do martial arts based on speed and agility while wearing heavy armour. Which is obvious, really, if you've ever practiced a martial art.