PSYCHOLOGY OF EMOTIONS

Detailed explanation-1: -An average sleep cycle lasts about 90 minutes. Ideally, you need four to six cycles of sleep every 24 hours to feel fresh and rested. Each cycle contains four individual stages: three that form non-rapid eye movement (NREM) sleep and one rapid eye movement (REM) sleep.

Detailed explanation-2: -Sleep cycles across the night are only approximately 90 minutes in length. There are lots of individual differences in cycle length and the variation may be from around 60 to 110 minutes.

Detailed explanation-3: -Each cycle lasts 90 minutes on average, and the recommended sleep time for adults is 7-8 hours. You can fit five complete 90-minute cycles during that time. If you sleep more or less, you risk interrupting these cycles and not resting well enough.

Detailed explanation-4: -Ideally, you should try to get more than 90 minutes of sleep. Sleeping between 90 and 110 minutes gives your body time to complete one full sleep cycle and can minimize grogginess when you wake.