Along with specific duration the standard of sleep is more important. Deep sleep may be a sleep stage during which brain waves are slowest it's also referred to as slow wave sleep. It’s hard to awaken from deep sleep, and if you are doing, you'll feel dazed.

Different stages of sleep:

To understand deep sleep we have to understand different stages of sleep. Our mind travels to 3 stages of NREM Non rapid eye movement sleep and 1 stage of Rapid eye movements sleep REM. This cycle continuous till you wake up.

Stage 1

Stage 2

Stage 3

Stage 4

Lightest Sleep

Light Sleep

Deep Sleep


Heart beat slows

Slow eye movement

Brain wave slows

Heartbeat and blood pressure increase

Slow eye movement

Hear beat slows further

Tissue repair and re-growth

Dream formation

Sudden Jerks

Body temperature begins to drop

Heartbeat at lowest

Eye movement  increases

Stage one: During this stage your heart beat slows down and your body starts relaxing with slow eye movement. In this stage you can easily be woken.

Stage two: In this stage you fall into deeper sleep, eye movement stop, heartbeat slows down, body temperature begins to drop and muscles start to relax.

Stage three: In this stage you are into deep sleep, brain waves are slowest and it’s difficult to awaken in this stage. This is the most important stage as in this stage the recovery and growth of the muscle and tissues happen.

Stage Four: In the last stage brain becomes more active, due to which you recollect memories and dream are formed. Breathing, heart rate and blood pressure increases in this stage.

Thus Deep Sleep is critical for overall growth of your mind and body which increases quality of life.

  • Energy restoration
  • Cell regeneration
  • Increasing blood supply to muscles
  • Increasing  growth and repair of tissues and bones
  • Strengthening the immune system

If you are not getting quality sleep it can lead to

  • Alzheimer disease
  • Heart Disease
  • Diabetes
  • Stroke

How Much Deep Sleep You Required?

Age Group

Sleeping Hrs

Deep Sleep Required Hrs

New born to 3 months



3 months to 1 Year



1 to 3 Year



3 to 5 Year



5 to 12 Year



12 to 18 Year



Over 18 Year




From the above table it’s clear as per age the duration of deep sleep needed changes. Younger people need more sleep as their body is growing and in developing stage compare to older.

Tips to Increase Deep Sleepcoolest mattress to sleep on

  • Heat helps in increasing slow wave sleep, so have a hot water bath before bed.
  • Have a proper bed time schedule in which you wake up and go to sleep at same time each day.
  • Exercising is beneficial in increasing the deep sleep. Studies have found people you exercise daily have better and quality sleep. Avoid exercise in hours before bedtime.
  • Avoid alcohol, caffeine and nicotine before bedtime
  • Set the bed room temperature right 60 to 67 degrees Fahrenheit for optimal sleep.
  • Avoid naps during afternoon
  • Avoid bright lights and loud noise from your bedroom.
  • Avoid screen watching mobile or computer when you’re on bed.
  • Use better quality Pillows and Mattress. Make sure your mattress is comfortable and supportive. Mattress which you have been using may be over 10 years which is greater than its life which is same for most good quality mattresses.

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