You should sit your sleep-deprived butt down before you hear the news I have to share with you today. Not only does it make you less productive — but it ups your odds of heart attack, stroke, or cancer. And makes you less charismatic. At least, according to one expert.

The Expert Opinion

Matthew Walker, founder and director of the Center for Human Sleep Science at the University of California, Berkeley, and the author of “Why We Sleep: Unlocking the Power of Sleep and Dreams,” has a thing or two to tell you. So what’s the correct amount? And that’s on top of the money you’re losing out on due to less sleep. Better start turning off your screens and revising your college applications now.   “And the same is true for sleep, although there are somewhat hard boundaries on the lower end. Once you get less than seven hours of sleep, you can measure marked impairments in both brain and body health. And those people who claim they can survive on six hours of sleep or less, unfortunately, are deluding themselves and their health.”

Change Starts With You

Look, the problem here is modern society. We all use an eight-hour work day — even though we work better in four-hour chunks — and it doesn’t leave us enough time to rest properly between all the other tiny chores we need to accomplish in our free time. But sadly, society isn’t about to change by itself. You’ll need to start by deciding what you value most: fitting in with everyone else’s work cycles, or getting a full, productive night’s sleep all the time. But if you do decide to keep deluding yourself with that six-hour sleep schedule, do yourself a favor and never bring up that fact when Matthew Walker’s in the room. Read more about being a healthy entrepreneur on TechCo