Be Active, Sleep Better! Aerobic Exercise Helps Beat Insomnia
Source: ScienceDaily (Sep. 15, 2010) — The millions of middle-aged and older adults who suffer from insomnia have a new drug-free prescription for a more restful night’s sleep. Regular aerobic exercise improves the quality of sleep, mood and vitality, according to a small but significant new study from Northwestern Medicine.
The study is the first to examine the effect of aerobic exercise on middle-aged and older adults with a diagnosis of insomnia. About 50 percent of people in these age groups complain of chronic insomnia symptoms.
The aerobic exercise trial resulted in the most dramatic improvement in patients’ reported quality of sleep, including sleep duration, compared to any other non-pharmacological intervention.
“This is relevant to a huge portion of the population,” said Phyllis Zee, M.D., director of the Sleep Disorders Center at Northwestern Medicine and senior author of a paper to be published in the October issue of Sleep Medicine. The lead author is Kathryn Reid, research assistant professor at Feinberg.
“Insomnia increases with age,” Zee said. “Around middle age, sleep begins to change dramatically. It is essential that we identify behavioral ways to improve sleep. Now we have promising results showing aerobic exercise is a simple strategy to help people sleep better and feel more vigorous.”
The drug-free strategy also is desirable, because it eliminates the potential of a sleeping medication interacting with other drugs a person may be taking, Reid said.
Sleep is an essential part of a healthy lifestyle, like nutrition and exercise, noted Zee, a professor of neurology, neurobiology, and physiology at Northwestern University Feinberg School of Medicine and a physician at Northwestern Memorial Hospital.
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“By improving a person’s sleep, you can improve their physical and mental health,” Zee said. “Sleep is a barometer of health, like someone’s temperature. It should be the fifth vital sign. If a person says he or she isn’t sleeping well, we know they are more likely to be in poor health with problems managing their hypertension or diabetes.” The study included 23 sedentary adults, primarily women, 55 and older who had difficulty falling sleep and/or staying asleep and impaired daytime functioning. Women have the highest prevalence of insomnia. After a conditioning period, the aerobic physical activity group exercised for two 20-minute sessions four times per week or one 30-to-40-minute session four times per week, both for 16 weeks. Participants worked at 75 percent of their maximum heart rate on at least two activities including walking or using a stationary bicycle or treadmill. Participants in the non-physical activity group participated in recreational or educational activities, such as a cooking class or a museum lecture, which met for about 45 minutes three to five times per week for 16 weeks. Both groups received education about good sleep hygiene, which includes sleeping in a cool, dark and quiet room, going to bed the same time every night and not staying in bed too long, if you can’t fall asleep. Exercise improved the participants’ self-reported sleep quality, elevating them from a diagnosis of poor sleeper to good sleeper. They also reported fewer depressive symptoms, more vitality and less daytime sleepiness. “Better sleep gave them pep, that magical ingredient that makes you want to get up and get out into the world to do things,” Reid said. The participants’ scores on the Pittsburgh Sleep Quality Index dropped an average of 4.8 points. (A higher score indicates worse sleep.) In a prior study using t’ai chi as a sleep intervention, for example, participants’ average scores dropped 1.8 points. “Exercise is good for metabolism, weight management and cardiovascular health and now it’s good for sleep,” Zee said. The research was funded by the National Institute on Aging
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Sleep Well: Why You Need To Fight For Good Sleep
A collection of studies published last Wednesday in the journal Sleep tackled some important questions: What are the health effects of not getting enough sleep? How does sleep deprivation affect teens? Does insomnia have long-term consequences?
Credit: Time Magazine
Given that past research has shown that short sleepers (and unusually long sleepers) die younger than people who get 6.5 to 7.5 hours per night, a new Penn State study looked at the impact of insomnia on mortality. The consequences could be dire: the study of 1,741 men and women in Pennsylvania found that insomniac men who slept less than 6 hours per day were four times more likely to die than those who got a full night’s rest. The study even adjusted for other medical conditions that affect sleep (and death rates), such as obesity, alcohol and depression. Of note, sleep deprivation did not affect women’s mortality.
In another study in Sleep, University of Sydney researchers focused on adolescents and young adults who weren’t getting enough sleep — an increasingly common problem among the digital generation, who stays up late plugged into their computers and smart phones. Turns out, burning the midnight oil can have long-term consequences. Researchers found that for each hour of lost sleep, levels of psychological distress rose by 5% in nearly 3,000 17-to-24-year-olds who were followed for 12 to 18 months. Overall, short sleepers were 14% more likely to report symptoms of psychological distress on a standard test, compared with people who got adequate sleep. The effect was especially pronounced among young people who already suffered from anxiety; in this group, lack of sleep triggered more serious mental health problems like full-blown depression and even bipolar disorder, according to the study’s lead author, Professor Nick Glozier. But even among those who began the study in good health, less than five hours of sleep meant tripling their odds of psychological distress.
A third Sleep study this week found that teens who didn’t get enough z’s consumed more calories than their well-rested peers. The study of 240 adolescents, average age 18, revealed that teenagers who slept less than 8 hours a night on weeknights ate 2% more calories from fat per day and 3% more calories from carbs than teens who slept longer. They also tended to get their calories from snacks instead of healthful meals. Cumulatively, this behavior increases the risk of obesity and, in turn, the chances of developing cardiovascular disease later in life.
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The American Academy of Sleep Medicine suggests that adults get an average of seven to eight hours of sleep per night, while the National Sleep Foundation recommends that adolescents need at least 8.5 hours, though only 15% of them get enough.
“Sleep disorders are common in the general population and even more so in clinical practice, yet are relatively poorly understood by doctors and other health care practitioners,” wrote Sue Wilson, the lead author of new guidelines published today by the British Association of Psychopharmacology to help doctors treat insomnia and other sleep disorders. Her advice: get a diagnosis from a sleep specialist for patients, then try behavioral therapy to improve their sleep before jumping to prescription medication. Most of all, pay attention to who you are treating: postmenopausal women might need hormone therapy, small children with ADHD might require melatonin treatment.
And if you suffer from disordered sleep patterns, consider these tips from the National Sleep Foundation:
Avoid caffeine. Tea, coffee, soda and energy drinks can keep you awake for up to 12 hours. Instead, when your mid-afternoon slump hits, try an energizing snack like nuts or yogurt.
Nest. Make your bed as comfortable as possible. Keep your sleep environment dark, cool and work-free.
Establish a routine. About an hour before bedtime, start a nightly relaxation routine that can include reading, taking a bath or anything else that soothes you. Complete all exercise at least three hours before bedtime. Don’t look at screens before you go to sleep, which can stimulate your brain.
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About Peter
Peter Brown BHMS (Hons) MPsychClin MAPS
I’m a Clinical Psychologist and have a private practice and consultancy in Brisbane Australia. I have 24 years experience in child, adult and family clinical psychology. I have a wonderful wife and three kids.
I am co-founder of Christian Wholeness Counselling Services.
I like researching issues of the brain & mind, reading and seeking out new books and resources for myself and my clients. I thought that others might be interested in some of what I have found also, hence this blog…
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