How many hours of sleep does a 23 year old need?

It's been awhile since I looked at this stuff... however here are some quick facts to remember: A full adult sleep cycle is approximately 6 hours long, anything over 6.5 is not normally medically required... -->Adults sleeping less them 6 hours usually show signs of memory problems and obesity -->People sleeping more 7-8 hours, are usually just as healthy as the 6 hours per day, if not healthier; However, for some reason they die earlier! This is an undeniable fact. What is unknown is why -->People sleeping more them 8 hours, will not only die sooner but experience a plethra of side effects Despite what North Americans have been trained to think, Naps are EXTREMELY HEALTHY. Between 8-12 hours after waking from your primary sleep block, it is a good idea to take a 15-30 minute nap. -->Anything over 30 minutes will begin to disturb your primary sleep block and begins to get unhealthy. -->Anything under 15 minutes should still be taken!!! If you only have 2 or 3 minutes then learn meditation then close your eyes and do it! Napping will improve your mood, allow you to think better and clearer, and improve your overall health.