Common Sleep Myths Compromise Good Sleep & Health

People often say they can get by on five or fewer hours of sleep, that snoring is harmless, and that having a drink helps you to fall asleep.

These are, in fact, among the most widely held myths about sleeping that not only shape poor habits, but may also pose a significant public health threat, according to a new study published online April 16 in Sleep Health.

Researchers from NYU School of Medicine reviewed more than 8,000 websites to identify the 20 most common assumptions about sleep. With a team of sleep medicine experts, they ranked them based on whether each could be dispelled as a myth or supported by scientific evidence, and on the harm that the myth could cause.

“Sleep is a vital part of life that affects our productivity, mood, and general health and wellbeing,” says study lead investigator, Rebecca Robbins, PhD, a postdoctoral research fellow in the Department of Population Health at NYU Langone Health. “Dispelling myths about sleep promotes healthier sleep habits which, in turn, promote overall better health.”

The claim by some people that they can get by on five hours of sleep was among the top myths researchers were able to dispel based on scientific evidence. They say this myth also poses the most serious risk to health from long-term sleep deficits. To avoid the effects of this falsehood and others identified in this study, such as the value of taking naps when you routinely have difficulty sleeping overnight, Dr. Robbins and her colleagues suggest creating a consistent sleep schedule and spending more time, at least seven hours, asleep.

Another common myth relates to snoring. And while Dr. Robbins says snoring can be harmless, it can also be a sign of sleep apnea, a potentially serious sleep disorder in which breathing starts and stops over the course of the night. The authors encourage patients not to dismiss loud snoring, but rather to see a doctor since this sleep behavior may lead to heart stoppages or other illnesses.

The study authors also found sufficient evidence in published studies that, despite beliefs to the contrary, drinking alcoholic beverages before bed is indeed unhealthy for sleep. According to experts, alcohol reduces the body’s ability to achieve deep sleep, which people need to function properly.

“Sleep is important to health, and there needs to be greater effort to inform the public regarding this important public health issue,” says study senior investigator Girardin Jean-Louis, PhD, a professor in the departments of Population Health and Psychiatry at NYU Langone. “For example, by discussing sleep habits with their patients, doctors can help prevent sleep myths from increasing risks for heart disease, obesity, and diabetes.”

The researchers acknowledge that some myths still cause disagreement among sleep experts. For instance, although sleeping in on weekends does disrupt the natural circadian rhythm, for people in certain professions, such as shift workers, it may be better for them to sleep in than to get fewer hours of sleep overall. These discrepancies, they say, suggest that further research needs to be done.

In addition to Dr. Robbins and Dr. Jean-Louis, other study authors include Michael Grandner from University of Arizona College of Medicine; Orfeu M. Buxton from Pennsylvania State University; Lauren Hale from Stony Brook Medicine; Daniel J. Buysse and Sanjay R. Patel from University of Pittsburgh School of Medicine; Kristen Knutson from Northwestern University Feinberg School of Medicine; Wendy M. Troxel from RAND Corporation; Shawn Youngstedt from Arizona State University; and Charles Czeisler from Brigham and Women’s Hospital and Harvard Medical School.

Originally published on NYU Langone Health.

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