because there is a global experiment that's performed on 1.6 billion people across 70 countries twice a year and it's called daylight savings time now in the spring when we lose an hour of sleep we see a subsequent 24% increase in heart attacks what in the fall in the Autumn when we gain an hour of sleep there's a 21% decrease in heart attacks so it's bidirectional that's how fragile and vulnerable your body is to even just the smallest perturbation of sleep Hour 1 hour