I used to wear a similar amount of weight for working on telecom towers (full body ironworker's harness + tools + equipment), and can confirm - could still outrun obese people even lugging ~150-200lbs of "extra" weight.      And I have no idea how obese people don't injure themselves constantly (or maybe they do?), because all that extra weight makes it really easy to hurt yourself if you step wrong, land off balance from a foot or two drop,  lean the wrong way, etc.  You have to be very deliberate when you move.  I can't imagine doing that 24hrs a day because it was like living in slow motion.