ARE YOU GETTING ENOUGH SLEEP?
The amount of sleep you need is dependent on your age:
Infants (ages 0-3 months) need 14-17 hours a day.
Infants (ages 4-11 months) need 12-15 hours a day
Toddlers (ages 1-2 years) need about 11-14 hours a day.
Pre-school children (ages 3-5) need 10-13 hours a day.
School-age children (ages 6-13) need 9-11 hours a day.
Teenagers (ages 14-17) need about 8-10 hours each day.
Most adults need 7 to 9 hours, although some people may need as few as 6 hours or as many as 10 hours of sleep each day.
Older adults (ages 65 and older) need 7-8 hours of sleep each day.
Women in the first 3 months of pregnancy often need several more hours of sleep than usual.
But if you feel drowsy during the day, even during boring activities, you may not be getting enough sleep.
WHAT IS SLEEP?
Sleep is a condition where our body and mind, typically recurs for several hours per night, where the nervous system becomes inactive, the eyes closed, the postural muscles relaxed, and our consciousness is suspended.
Sleep Cycle Stages
NREM- STAGE 1
Your eyes are closed, but it's easy to for you to wake up. This phase may last from 5 to 10 minutes.
NREM - STAGE 2
This is light sleep. Your heart rate will slow and your body temperature drops. Your body is getting ready for deep sleep.
NREM - STAGE 3
This is the deep sleep stage. It's harder to rouse you during this stage, and if someone woke you up, you would feel disoriented for a few minutes. During the deep stages of NREM sleep, your body repairs and regrows tissues, builds bone and muscle, and strengthens the immune system.
REM- STAGE 4
Usually, REM sleep happens 90 minutes after you fall asleep. The first period of REM typically lasts 10 minutes. Each of your later REM stages gets longer, and the final one may last up to an hour. Your heart rate and breathing quickens. You can have intense dreams during REM sleep, since your brain is more active.