HOW MUCH SLEEP DO WE RE­ALLY NEED?

BBC Earth (Asia) - - Science -

The cliché is that we need eight hours a night, but the ac­tual an­swer to this ques­tion is more com­pli­cated. Our sleep re­quire­ments change through­out life. Guide­lines pro­posed by the Na­tional Sleep Foun­da­tion in 2015 rec­om­mended that new­borns have 14 to 17 hours per night, teenagers have 8 to 10 hours, and adults have 7 to 9 hours. These guide­lines fo­cus largely on ‘av­er­age’ re­quire­ments, but in­di­vid­u­als can dif­fer greatly from one an­other. For ex­am­ple, it may be ap­pro­pri­ate for cer­tain teenagers to have as few as 7 hours per night, or as many as 11. If you’re not func­tion­ing your best, it’s worth con­sid­er­ing whether you’re get­ting enough sleep. AGr

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