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Just How Much Sleep Do We Really Need?

by Sharon Gayle September 15, 2010

Quite a bit it seems!


Though scientists are still learning about the concept of basal sleep need, one thing sleep research certainly has shown is that sleeping too little can not only inhibit your productivity and ability to remember and consolidate information, but lack of sleep can also lead to serious health consequences and jeopardize your safety and the safety of individuals around you.

For example, short sleep duration is linked with:

  • Increased risk of motor vehicle accidents
  • Increase in body mass index – a greater likelihood of obesity due to an increased appetite caused by sleep deprivation
  • Increased risk of diabetes and heart problems
  • Increased risk for psychiatric conditions including depression and substance abuse
  • Decreased ability to pay attention, react to signals or remember new information.

According to researchers Michael H. Bonnet and Donna L. Arand, "There is strong evidence that sufficient shortening or disturbance of the sleep process compromises mood, performance and alertness and can result in injury or death. In this light, the most common-sense 'do no injury' medical advice would be to avoid sleep deprivation."

On the other hand, some research has found that long sleep durations (nine hours or more) are also associated with increased morbidity (illness, accidents) and mortality (death). ...Researchers caution that there is not a definitive conclusion that getting more than nine hours of sleep per night is consistently linked with health problems and/or mortality in adults, while short sleep has been linked to both these consequences in numerous studies.

Though research cannot pinpoint an exact amount of sleep need by people at different ages, the following table identifies the "rule-of-thumb" amounts most experts have agreed upon. Nevertheless, it's important to pay attention to your own individual needs by assessing how you feel on different amounts of sleep. Are you productive, healthy and happy on seven hours of sleep? Or does it take you nine hours of quality ZZZs to get you into high gear? Do you have health issues such as being overweight? Are you at risk for any disease? Are you experiencing sleep problems? Do you depend on caffeine to get you through the day? Do you feel sleepy when driving? These are questions that must be asked before you can find the number that works for you. For complete research article click on link below. ~SG

Excerpt from "How Much Sleep Do We Really Need?"
National Sleep Foundation

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