The Sleep Cycle

The Sleep Cycle determines the Quality of your Sleep

Surprising to many, the quality of one’s sleep does not hold a direct relationship with the number of hours slept. Instead, it has got to do with the intriguing phenomenon called “circadian rhythm” or more widely known as the sleep cycle.

The sleep cycle consists of 5 stages. In each stage, human will display unique and distinctive brain waves.  The sleep cycle ranges from 90 minutes to around 120 minutes. It varies for different people. Assuming one has a sleep cycle of 90 minutes, the time will be divided in this way:

–         65 minutes of normal, or non-REM (rapid eye movement)

–         20 minutes of REM sleep (in which we dream)

–         follwed by another 5 minutes of non-REM sleep to end of the cycle.

Therefore under natural circumstances, one’s sleep, having gone through a series of sleep cycle should last 6 hours, 7 1/2 hours, or 9 hours. One, who has slept in multiples of 90 minutes, would have completed each of his individual sleep cycle and thus would feel more refreshed and energetic as compared to one who has not completed his sleep cycle.

It is therefore imperative for one to complete each of his sleep cycle.