Think of everything you do during your day. Try to guess which activity is so important you should devote one-third of your time to doing it. Probably the first things that come to mind are working, spending time with your family, or pursuing leisure activities. But there’s something else you should be doing about one-third of your time - sleeping.
Many people view sleep as merely a “down time” when their brain shuts off and their body rests. In a rush to meet work, school, family, or household responsibilities, people cut back on their sleep, thinking it won’t be a problem, because all of these other activities seem much more important. But research reveals that a number of vital tasks carried out during sleep help to maintain good health and enable people to function at their best.
While you sleep, your brain is hard at work forming the pathways necessary for learning and creating memories and new insights.
Without enough sleep, you can’t focus and pay attention or respond quickly. A lack of sleep may even cause mood problems. In addition, growing evidence shows that a chronic lack of sleep increases the risk for developing obesity, diabetes, cardiovascular disease, and infections.
Despite the mounting support for the notion that adequate sleep, like adequate nutrition and physical activity, is vital to our wellbeing, people are sleeping less. The nonstop “24/7” nature of the world today encourages longer or nighttime work hours and offers continual access to entertainment and other activities. To keep up, people cut back on sleep. A common myth is that people can learn to get by on little sleep (such as less than 6 hours a night) with no adverse consequences. Research suggests, however, that adults need at least 7 - 8 hours of sleep each night to be well rested. Indeed, in 1910, most people slept 9 hours a night. But recent surveys show the average adult now sleeps less than 7 hours a night, and more than one-third of adults report daytime sleepiness so severe that it interferes with work and social functioning at least a few days each month. As many as 70 million Americans may be affected by chronic sleep loss or sleep disorders, at an annual cost of $16 billion in health care expenses and $50 billion in lost productivity.
What happens when you don’t get enough sleep? Can you make up for lost sleep during the week by sleeping more on the weekends?
How does sleep change as you become older? Is snoring a problem? How can you tell if you have a sleep disorder? Read on to find the answers to these questions and to better understand what sleep is and why it is so necessary. Learn about common sleep myths and practical tips for getting adequate sleep, coping with jet lag and nighttime shift work, and avoiding dangerous drowsy driving.
Many common sleep disorders go unrecognized and thus are not treated. This booklet also gives the latest information on sleep disorders such as insomnia, sleep apnea, restless legs syndrome, narcolepsy, and parasomnias.
“When I think of every step in my life, sleep, or lack of sleep, was really instrumental in speeding me up or slowing me down, respectively.”
Vice Admiral Richard H. Carmona, M.D., M.P.H., F.A.C.S., U.S. Surgeon General, made these remarks at the 2004 National Sleep Conference at the National Institutes of Health.
Revision date: July 4, 2011
Last revised: by Janet A. Staessen, MD, PhD