Lots of prominent people like to highlight how early they rise, but is it really something to brag about?

Tim Cook, the CEO of Apple, rises a little before 4am every day. President Donald Trump wrote in his 2004 book that he only needs four hours of sleep a night. David Cush, the former Virgin America CEO, has said that he wakes up at 4:15. And Jennifer Aniston wakes up around 4:30 to meditate, as does Kris Jenner, the same time that Michelle Obama is hitting the gym.

Recently, Steve Harvey declared: "Rich people don't sleep eight hours a day."

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What happens when we don't get enough sleep?

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But would you still face these issues if you sleep for eight hours and wake up at 4am?

What if I don't need that much sleep?

The benefits of sleeping

Tips on getting more sleep