# How to survive 5 hours of sleep

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## What happens if you only sleep for 5 hours?

Sometimes life calls and we don’t get enough sleep. But five hours of sleep out of a

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Your Actual Sleep Need Is Definitely More Than Five Hours

As Dr. Thomas Roth says in Matthew Walker’s book, Why We Sleep, “The number of people who can survive on 5 hours of sleep or less without any impairment, expressed as a percent of the population, and rounded to a whole number, is zero.”

## How many hours does Elon Musk sleep?

Musk wakes up each morning at around 7 am. He says he likes getting around six to six-and-a-half hours of sleep per night. Sleeping in is not an option for him, saying it affects his performance more than if he sleeps less.

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Ideally, you should try to get more than 90 minutes of sleep. Sleeping between 90 and 110 minutes gives your body time to complete one full sleep cycle and can minimize grogginess when you wake. But any sleep is better than not at all — even if it’s a

## How Little sleep Can you survive on?

The longest recorded time without sleep is approximately 264 hours, or just over 11 consecutive days. Although it’s unclear exactly how long humans can survive without sleep, it isn’t long before the effects of sleep deprivation start to show. After only three or four nights without sleep, you can start to hallucinate.

## What’s the least amount of sleep you can survive on?

The bare minimum of sleep needed to live, not just thrive, is 4 hours per 24-hour period. Seven to 9 hours of sleep are needed for health, renewal, learning, and memory.

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For most people, 4 hours of sleep per night isn’t enough to wake up feeling rested and mentally alert, no matter how well they sleep. There’s a common myth that you can adapt to chronically restricted sleep, but there’s no evidence that the body functionally adapts to sleep deprivation.