PSYCHOLOGY OF EMOTIONS

Detailed explanation-1: -NREM sleep constitutes about 75 to 80 percent of total time spent in sleep, and REM sleep constitutes the remaining 20 to 25 percent.

Detailed explanation-2: -It’s estimated that newborns spend about 40%-70% of their sleep in REM. That translates to, on average, 8-11 hours per day in REM. As we age, REM sleep lessens. Children spend about 25%-30% of their sleep in REM, and adults spend 15%-20% of their sleep in this stage.

Detailed explanation-3: -We need the most REM sleep as infants and children, when our brains are still developing. Newborn babies spend eight hours in REM sleep each day. By adulthood, we only need an average of two hours of REM sleep each night.

Detailed explanation-4: -For healthy adults, 20-25% of your total time asleep should be REM sleep. That’s where the 90-minute number mentioned above comes from. If you sleep for 7-8 hours, 20% of that equates to roughly an hour-and-a-half, or 90 minutes. However, it’s worth noting that the amount of REM sleep we need also declines with age.