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Just like you need about eight glasses of water every day, you need on average eight hours of sleep. This all depends on you. If you are young, then it is normal to sleep up to 12 hours every night as younger people use much more energy, requiring more sleep.

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15y ago
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10y ago

Sleeping is divided into 4 stages(former 5).

  1. NREM stage 1
  2. NREM stage 2
  3. NREM stage 3(former stage 3 and 4)
  4. REM (stage 4, former stage 5)

Deep sleep or Slow-Wave Sleep is in stage 3.

Depending on your age the amount you are in every stage and total sleep time vary. A healthy adult will need 7-8 hours of sleep every night. While sleeping you will go through the stages like this:

1 - 2 - 3 - 2 - 4

5% - 25% - 20% - 25% - 25%

24m. - 2h. - 96m. - 2h. - 2h.

Deep Sleep is believed needed to contain new memories for the future. This is also the stage were your brain "reset" from the days tasks and duties.

NREM = None Rapid Eye Movement sleep

REM = Rapid Eye Movement sleep

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15y ago

you need at least 8 hours you need at least 8 hours

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Wiki User

12y ago

"You need an average of 7 hours of deep sleep a night. I have a two year old and haven't gotten that for 2 years. Loss of sleep can make you irritated, slow, and easily forgetful."

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Anonymous

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3y ago

3.5hrs

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Q: How much deep sleep do you need?
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You need 8 hours of sleep, and you have to be in deep sleep at 1-4 a.m.


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Is rem sleep deep?

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What is the proper medical answer for how much sleep an adult need?

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