Posts Tagged ‘Sleep Disorders’
Do you feel permanently tired? Do you get less sleep than you would like? Do you have a hard time falling asleep at night? Is your sleep frequently interrupted? Do you wake up from a deep slumber when your alarm clock goes off? Are you still sleepy or groggy in the morning? Are you regularly exhausted in the afternoon or evening? If so, it may not only be your lifestyle but also your diet that wreaks havoc on your sleep.
Millions of Americans are chronically sleep deprived. For many there seems never enough time for rest, and it takes a toll on people’s health. One often-seen response to sleep deprivation is increased food consumption, which can lead to unhealthy weight gain. While clinical research has long shown connections between sleeplessness and weight problems, a new study has found that eating habits also influence sleep in ways that were previously not considered.
Researchers from Perelman School of Medicine at the University of Pennsylvania studied how various diet and sleep patterns correlate by evaluating self-reported data from a survey by the National Health and Nutrition Examination (NHANES), involving thousands of participants.
According to the study’s findings, people who slept fewer hours also had different eating habits and food preferences than those who allowed themselves more rest. For instance, short sleepers (usually five to six hours per night) consumed more calories on average but had less variety in their food choices than normal (seven to eight hours) and long sleepers (nine or more hours). Long sleepers consumed the least amount of calories but had a less varied diet than normal sleepers.
The reasons for these differences are not altogether clear. Short sleepers may generally have less time to take care of their dietary needs, such as food shopping, cooking and taking breaks for meals. Normal and long sleepers may have a more leisurely lifestyle.
Prior studies on diet and sleep have primarily focused on how sleep, or lack thereof, influences eating habits. There is growing evidence that overeating and binge eating are frequently linked to sleep problems. One particular study showed that participants whose sleep was restricted for a specific period of time increased their food intake by up to 500 calories per day. Poor sleep made them vulnerable to overeating and weight gain over time, says Dr. Virend Somers, a professor of medicine at the Mayo Clinic and lead author of the study. Surprisingly, the additional waking hours did not allow them to burn more calories than their better-sleeping counterparts.
How exactly insufficient sleep leads to greater appetite is not yet fully understood. One possible explanation is that many important functions in the body are affected by sleep deprivation, including hormonal functions that regulate appetite and satiety. A reduction in the hormone leptin, an appetite-suppressing hormone that is released by fat cells during the night, may be a cause. The hunger-stimulating hormone ghrelin, which responds to sleep restriction with increased secretion, may also play a role. Furthermore, lack of sleep can reduce sensitivity to insulin, thereby weakening blood sugar regulation and the ability to metabolize blood sugar.
Obviously, it is not always easy to make changes to one’s sleeping habits because of pressures from work, long commutes and other chores. Still, there can be room for improvement by setting priorities.
Here are some suggestions: Neither food nor drink, especially alcohol, should be consumed later than two hours before bedtime. A full stomach is not conducive to restful sleep. Caffeine may keep you awake. Late intake of liquids may have you go to the bathroom during the night.
There are also issues that are not diet-related. The final hours of the day should be spent with as little exposure to stimulating events as possible. That includes late night exercising, watching TV, dealing with e-mails or discussing controversial subjects.
Observing good sleep hygiene is equally as important. Setting the right temperature, dimming the lights and keeping the bedroom uncluttered are just a few examples.
Some changes will require experimentation. What matters most is that your actions as well as your environment help you getting the rest you need.
Timi Gustafson R.D. is a registered dietitian, newspaper columnist, blogger and author of the book “The Healthy Diner – How to Eat Right and Still Have Fun”®, which is available on her blog and at amazon.com. For more articles on nutrition, health and lifestyle, visit her blog, “Food and Health with Timi Gustafson R.D.” (www.timigustafson.com). You can follow Timi on Twitter and on Facebook.
Many Americans are chronically sleep deprived. Our busy work schedules, long commutes and countless demands at home don’t leave us enough time for a good night’s rest, let alone daytime breaks. In contrast to other cultures, taking siestas is often associated here with laziness and lax work ethics. We rather push through and, if necessary, fuel up on caffeine and power bars when our energy level goes down.
In terms of productivity, that may be a virtuous attitude, but staying awake all day followed by six to eight hours of slumber is not necessarily “natural” for human beings. In fact, we are in the minority among mammals when it comes to sleep habits. Studies on sleep patterns of animals have found that 85 percent of mammalian species are polyphasic sleepers, meaning they sleep for several shorter periods of time in a 24-hour cycle. Monophasic sleepers like us adhere to two distinct periods of wakefulness and rest. But that may have developed culturally rather than out of biological necessity.
Historically speaking, the idea that we should ideally spend long stretches of uninterrupted sleep is relatively recent. It’s a narrow concept, according to David K. Randall, author of “Dreamland: Adventures in the Strange Science of Sleep,” and we don’t even share it with all of the world’s population.
With regards to productivity, there is no guarantee that working longer and harder always produces better results. Some of the greatest achievers in history, among them Winston Churchill, Albert Einstein and Thomas Edison, insisted on regular afternoon naps.
Even corporate America is discovering the benefits of allowing workers to doze off a bit when they feel sluggish. There is an increased tolerance for napping and other alternative schedules at many of today’s workplaces, says Randall. He names Google as an example where napping is not only permitted but even encouraged because the company believes it promotes creativity.
Health experts agree. “You can get incredible benefits from 15 to 20 minutes of napping” said Dr. Sara C. Mednick, a professor of psychiatry at the University of California, San Diego, and author of “Take a Nap! Change Your Life,” in an interview with WebMD. “You reset the system and get a burst of alertness and increased motor performance. That’s what most people really need to stave off sleepiness and get an energy boost.”
Besides restoring alertness and enhancing performance, napping also has a number of psychological benefits. A nap can have similar effects as a mini-vacation or a spa treatment and can provide an easy way to get some relaxation and rejuvenation, according to researchers at the Sleep Foundation.
Especially older people can profit from taking daytime rests, not only for their physical but also their mental well-being. “People who nap generally enjoy better mental health and mental efficiency than people who do not,” says Dr. Andrew Weil, author of numerous best-selling books, including “Healthy Aging” (Knopf, 2005). But, he cautions, the “timing and duration of naps are important: Too much, too often, or at the wrong time of day can be counterproductive.” That is particularly true for seniors who suffer from sleep disturbances that come with aging. Still, napping, Dr. Weil says, is a good way to take care of the body’s need for rest, which increases with age.
To get the most out of your naps, Dr. Mednick recommends to keep them short, about 20 to 30 minutes max; to make them a regular habit and schedule them roughly at the same time; to take them in a place that is protected from light and noise and has a sleep-conducive room temperature, that is slightly cooler than your work environment but warm enough that you don’t freeze.
If you enjoyed this article, you may also be interested in “The Importance of Sleep for Your Health.”
Timi Gustafson R.D. is a clinical dietitian and author of the book “The Healthy Diner – How to Eat Right and Still Have Fun”®, which is available on her blog, “Food and Health with Timi Gustafson R.D.” (http://www.timigustafson.com), and at amazon.com. You can follow Timi on Twitter and on Facebook.