 uh... is so uh... you should be exercising they say eighty percent of your maximal heart rate so a hundred and twenty would be you know kind of the upper limits of where you would want to be at that age uh... you don't give me a number as to what your heart rate is but you say it's catastrophically high uh... that may mean it's in the uh... high hundreds or maybe over two hundreds uh... that's tachycardia and that's a sign that the governor on your heart