To be fair 200 lbs of deadweight (carrying a human body that is) is incredibly hard. 180 is easy so somewhere in between is where my legs give in
the arms are fine; it's the legs and the walking.
What do you do for work? Sit at a desk? If you can lift your own weight off the ground (pushups) you should be okay no? Logically
.... try gettign up to 30 pushups maybe? That's where I am and I can do my own weight easy.
M