Article: Get all-day energy even if you're low on sleep: your body functions best on 8 hours of sleep, but who gets that? Here's what happens when you lose 2, 4, and 6 hours of sleep--and what you'll need to make it through the day. (Health).

HERE'S HOW IT AFFECTS...

YOUR BRAIN Losing just an hour or two throws off your thinking. Your brain isn't able to process complex thoughts as quickly, and you find it harder to multitask successfully.

YOUR BODY You're yawning-- along with your coworkers (Americans average about 7 hours of sleep a night). You might think you can adapt to getting less sleep, but research proves otherwise: After a week of six-hour nights, you function as if you've lost an entire night's sleep.

YOUR LONG-TERM HEALTH Getting six hours of sleep a night regularly could set you up for blood-vessel damage, which can open the door to much larger problems, like ...

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