if you sleep 10-11 hours a night, how much of that is considered "good sleep"?

Danielle Z

The amount of sleep someone needs changes over the course of their lifetime. The article states that it can depend on age, activity level, general health, and lifestyle habits. The average amount of sleep for an adult is around 7-9 hours a night but one article suggests that someone should have about 4-5 "sleep cycles" a night and each sleep cycle is about 90 minutes. I couldn't actually find how many of good hours of sleep someone would be getting if they sleep an average of 10-11 hours a night, but oversleeping can definitely have some negative health consequences. The article says that some health problems could include diabetes, obesity, headaches, heart disease, and overall increase risk for death. The article specifically stated "people who slept for nine or 10 hours every night were 21% more likely to become obese over a six year period" and that headaches can become more likely because of "the effect oversleeping has on certain neurotransmitters in the brain". This may not be the case for everyone, but researchers have found that some cases of over sleeping have been linked to depression or low socioeconomic status.

Sources:
http://www.webmd.com/sleep-disorders/guide/physical-side-effects-oversleeping
http://news.discovery.com/human/health/sleep-quality-insomnia-rem-michael-jackson-130701.htm