Adult needs about 7 to 8 hours of sleep to achieve optimal efficiency during wake time.
Research found out that adult sleeping less than 5 hours a day might have an unhealthy life and an overall reduced lifespan (Due to health problems, suppressed immune system and work accident).
If an adult you are speaking about is in his/her 60++ years old, the normal sleep time will usually decrease by about 2 hours making it an average of 6 hours.
Elderly adult will have a shorter period of sleep time but an adult of 20++ years old will need 7 to 8 hours as mentioned.
Hope that answers your question.
an adult need sleep of maximum 8 hours.
alot
The average adult should be getting 7 to 8 hours sleep regularly for good health.
The amount of sleep may vary so much, although most of adults get restored after 5 to 8 hours of sleep.
Adult humans need around eight-ten hours of sleep every night.
My doctor has told me that tweens need 9 hours of sleep a night! A Sleep Doctor should tell you to sleep 10 hours of sleep not 9 hours. Now Adult can sleep up to 6 hours, there bodys don't need that much sleep:)
Children need about 9-10 hours of sleep a night. Young adults should get around 8-9 hours of sleep a night.
teens need about 9 to 10 hrs per night but adults need at least 8.
nine to ten hours of sleep, due to puberty and raging hormones.
The average 7th grader should get atleast 8-9 hours of sleep. No lower than that.
Lions sleep more on their side then on their backs.
About 8 to 10 hours.