7 minimum, 8.5 max. I get migraines frequently (1-6 per month) and sleep seems to be one of the biggest contributing factors. Less than 7 hours almost correla

7 minimum, 8.5 max. I get migraines frequently (1-6 per month) and sleep seems to be one of the biggest contributing factors. Less than 7 hours almost correlates directly with waking up with a headache. More than 8.5-9 and I tend to feel lazy and unmotivated.