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It's recommended that adults get between 7 and 9 hours of sleep each night.

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Q: How many hours should a 21 year old sleep?
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Related questions

How many hours of sleep in a year?

if you mean how many hours you should sleep in a year it would be 3,650 hours of sleep for a regular year not a leap year


How many hours of sleep should an eighteen year old have?

They should have 8 or more hours of sleep in a day.


How many hours of sleep should a 9 year old be getting?

A nine year should be getting 9-12 hours of sleep.


How many hours of sleep should a 22 year old get?

At least 8 hours of sleep.


How many hours a day should a 4 year old sleep?

A four year old should sleep 12 hours a day


How many hours of sleep should a 8 year old girl have?

At least 8 hours of sleep.


How many hours should an 11 year old get of sleep a day?

A ten year old should sleep at least 8 to 9 hours a day.


How many hours of sleep should a 42 year old get?

8 hours


How many hours of sleep does a 5 year old need a night?

A 5 year old should sleep around 10 to 11 hours and adults should sleep around 7-8 hours.


How many hours of sleep should a 40 year old woman get?

13 hours sleep per day?


How many hours should a 17 year old man sleep?

A 17 year old man should have about 7.5-8 hours of sleep each night.


How many hours of sleep should 8 year olds get?

An 8 year old should get 8 hours of sleep because that's what a doctor would recommend