In general, most adults need between seven and nine hours of sleep per night. Someone who gets this recommended amount will generally go through between four and six sleep cycles (all of the sleep ...

In the relentless bustle of our everyday lives, sleep is something both precious and needed in order to be a functioning human being. Many of us probably find ourselves struggling to figure out what ...

Your sleep cycle includes light, slow-wave, deep, and REM sleep, which repeat throughout the night. To get restful sleep, you need to spend the right amount of time in each stage of the sleep cycle.