My friends call me a vampire because I don't sleep much I go to sleep at 4:00 ish and wack up at 6:30 ish and im totaly fine I just dont need sleep and when I sleep it's during the day and I'm up at night during the week i sleep 2-3 hours a night am I normal

The heart beats a set amount of times, and the less you sleep, the more it beats overtime.
Sleep means slower heartrate.
More sleep = more years to live.