Originally Posted by krazyderek
i had a 280 hr once, after a 20km/h (treadmill) sprint, measured it by hand so it's real, funny thing is i think it actually increased once i realised how dangerously high it was lol
HAH!
Ya, ok. First of all you wouldn't be able to count it by hand that fast as it is practically 5 beats/ second.
Second, you would probably be dead by now if you didn't go to a cardiologist right after.