Physiologically speaking, we all need at least 7 hours sleep a night. I know most people like to brag and boast about only needing 3 or 4 hours of sleep a night, but they're doing their bodies more harm than good. Why? Your body needs those 7 hours of sleep in order to repair itself. Your muscles and constantly breaking down throughout the day, your nervous system is on high and reacting to everything, and your senses are on full alert so that you can interact with your surroundings. Your body needs that 7 hours of sleep in order to repair all the stress that is placed on it while you're awake. In order to get a peaceful 7 hours, an adjustable bed mattress can make it happen.
External Sources:
Adjustable Bed Mattress: Get The Best Sleep Possible