Two studies being presented today shed light on the importance of rapid eye movement (REM) sleep.
A study (#1284) being presented as a poster until 12:15 p.m. Pacific Time reports that in both men and women, REM appears to modulate negative affect; in females, REM also may modulate negative autobiographical memories. According to the study’s author, the results suggest that severe depression in women may be associated with an excess of REM sleep.
Another study (#0379) that will be presented this afternoon as an oral presentation suggests that REM sleep may enhance the brain’s empathetic capacity toward positive emotions. Results show that participants who did not take an afternoon nap displayed an amplified reaction to expressions representing anger and fear when tested on a face-rating task at 5 p.m. In contrast, participants who had an afternoon nap opportunity lasting 60 to 90 minutes displayed an increased receptiveness to happy facial expressions following sleep; however, this beneficial effect was found only in participants who achieved REM sleep during the nap.
The American Academy of Sleep Medicine reports that sleep involves multiple stages that make up a sleep cycle. Each complete cycle lasts about 90 to 110 minutes; most adults will go through four to six cycles in a full night of sleep. REM sleep tends to be the final stage of the sleep cycle in normal adult sleep. Most dreams occur during this sleep stage. Find more about the stages of sleep on SleepEducation.com.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Showing posts with label poster presentation. Show all posts
Showing posts with label poster presentation. Show all posts
Wednesday, June 10, 2009
Sleepless and Stressed
A study (#1268) being presented this morning as a poster reports that there is a bidirectional relationship between stress and poor sleep.
Results show that higher habitual stress is associated with reported shorter sleep duration, poorer sleep quality, and daytime functioning impairments. Conversely, daytime functioning impairments and shorter sleep duration demonstrated a predictive relationship with habitual stress complaints.
In February the Sleep Education Blog reported that stress related to the struggling economy can have a negative impact on sleep. On SleepEducation.com the American Academy of Sleep Medicine describes how job stress can affect sleep.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Results show that higher habitual stress is associated with reported shorter sleep duration, poorer sleep quality, and daytime functioning impairments. Conversely, daytime functioning impairments and shorter sleep duration demonstrated a predictive relationship with habitual stress complaints.
In February the Sleep Education Blog reported that stress related to the struggling economy can have a negative impact on sleep. On SleepEducation.com the American Academy of Sleep Medicine describes how job stress can affect sleep.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Sleep & Women: Rheumatoid Arthritis
A study (#1007) that will be presented later this morning as a poster indicates that women with rheumatoid arthritis report poor sleep quality.
The study involved 133 women with RA; their average age was 56 years and they had RA for an average of almost 15 years.
Results show that 71 percent of the women had poor self-reported sleep quality. Pain, depression and poor adherence to RA medications also contributed to impaired sleep.
The American Academy of Sleep Medicine reports that many medical and neurological disorders may give rise to chronic insomnia. Disorders that cause pain, breathing problems, limited mobility, and central nervous system (CNS) symptoms are the major ailments that cause difficulty initiating and maintaining sleep. Find more about insomnia due to medical condition on SleepEducation.com.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
The study involved 133 women with RA; their average age was 56 years and they had RA for an average of almost 15 years.
Results show that 71 percent of the women had poor self-reported sleep quality. Pain, depression and poor adherence to RA medications also contributed to impaired sleep.
The American Academy of Sleep Medicine reports that many medical and neurological disorders may give rise to chronic insomnia. Disorders that cause pain, breathing problems, limited mobility, and central nervous system (CNS) symptoms are the major ailments that cause difficulty initiating and maintaining sleep. Find more about insomnia due to medical condition on SleepEducation.com.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Sleep & Motherhood
Two studies that will be presented later this morning as posters examine issues related to sleep and motherhood.
One study (#0143) reports that although postpartum mothers’ sleep is disturbed and leads to significant daytime consequences, the timing of their nocturnal sleep may be preserved. Results show that the actual bedtimes and wake times of first-time mothers of newborns were positively correlated with their preferred times. Mothers with both a newborn and other children also tended to fall asleep at their preferred time, but they woke up earlier than their preferred time.
Another study (#0243) suggests that parental presence at bedtime appears to be the factor that impacts sleep more than literal co-sleeping. The study involved parents of 29,287 infants and toddlers from 17 countries. Results show that in predominately Caucasian countries, bed sharing was reported by 11.8 percent of parents and room sharing by 22 percent; in predominately Asian countries these figures were 64.7 percent and 86.5 percent. In predominately Caucasian countries, children who slept in a separate room obtained more sleep, woke less at night, had less difficulty at bedtime, fell asleep faster, and were perceived as having fewer sleep problems; only 40.9 percent of their parents were present with them at bedtime.
Last year at SLEEP 2008 the same research team reported that young children in predominately Caucasian countries have earlier bedtimes and obtain more overall sleep than young children in predominately Asian countries. U.S. children had an average bedtime of 8:52 p.m. and averaged 12.9 hours of total sleep time per day.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
One study (#0143) reports that although postpartum mothers’ sleep is disturbed and leads to significant daytime consequences, the timing of their nocturnal sleep may be preserved. Results show that the actual bedtimes and wake times of first-time mothers of newborns were positively correlated with their preferred times. Mothers with both a newborn and other children also tended to fall asleep at their preferred time, but they woke up earlier than their preferred time.
Another study (#0243) suggests that parental presence at bedtime appears to be the factor that impacts sleep more than literal co-sleeping. The study involved parents of 29,287 infants and toddlers from 17 countries. Results show that in predominately Caucasian countries, bed sharing was reported by 11.8 percent of parents and room sharing by 22 percent; in predominately Asian countries these figures were 64.7 percent and 86.5 percent. In predominately Caucasian countries, children who slept in a separate room obtained more sleep, woke less at night, had less difficulty at bedtime, fell asleep faster, and were perceived as having fewer sleep problems; only 40.9 percent of their parents were present with them at bedtime.
Last year at SLEEP 2008 the same research team reported that young children in predominately Caucasian countries have earlier bedtimes and obtain more overall sleep than young children in predominately Asian countries. U.S. children had an average bedtime of 8:52 p.m. and averaged 12.9 hours of total sleep time per day.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Caffeine Prevents Risk Taking After 75 Hours of Sleep Deprivation
A study (#0473) that will be presented later this morning as a poster reports that caffeine use prevents increased risk taking after 75 hours of total sleep deprivation.
The study at the Walter Reed Army Institute of Research involved 25 healthy adults between 20 and 35 years of age who were deprived of sleep for three nights. Twelve participants received 200 mg caffeine gum bi-hourly from 1 a.m. to 7 a.m. each morning (for a total of 800 mg per morning); 13 participants received identical placebo gum.
A behavioral task of risky behavior was administered after 51 hours of wakefulness and again after 75 hours of sleep deprivation. Results show that risk taking was unaffected in the placebo group after 51 hours, but increased significantly by 75 hours.
The caffeine group remained unchanged at both time points and was significantly less risky than the placebo group at 75 hours. The study suggests that extreme sleep deprivation may cause individuals to reach a “breaking point” at which they are less likely to inhibit risky behavior.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
The study at the Walter Reed Army Institute of Research involved 25 healthy adults between 20 and 35 years of age who were deprived of sleep for three nights. Twelve participants received 200 mg caffeine gum bi-hourly from 1 a.m. to 7 a.m. each morning (for a total of 800 mg per morning); 13 participants received identical placebo gum.
A behavioral task of risky behavior was administered after 51 hours of wakefulness and again after 75 hours of sleep deprivation. Results show that risk taking was unaffected in the placebo group after 51 hours, but increased significantly by 75 hours.
The caffeine group remained unchanged at both time points and was significantly less risky than the placebo group at 75 hours. The study suggests that extreme sleep deprivation may cause individuals to reach a “breaking point” at which they are less likely to inhibit risky behavior.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Sleep & Growing Older
Three studies that will be presented later this morning as posters shed light on issues related to sleep in older adults.
A study (#0363) involving Sleep Heart Health Study participants used direct measures of sleep fragmentation to show that increases in specific sleep stage transitions during the night are associated with higher mortality risk. This association was found in middle-aged and older adults who had more objectively measured wake to non-rapid eye movement (NREM) sleep transitions per hour of sleep, and in participants who had more NREM to wake transitions. Over the average follow-up period of eight years, 854 of the 5,614 participants died (15.2 percent).
A study (#0373) involving a national sample of older Americans shows that more than 55 percent reported sleeping for an average of seven hours or less per night during the past month. But only 18 percent reported that they “often” or “almost always” feel “unrested during the day.” The average age of the 1,570 participants was 71.9 years.
Another study (#0420) reports that older adults (between 59 and 82 years of age) showed more resiliency to total sleep deprivation than younger adults (between 19 and 38 years of age) on a range of measures of cognitive performance. Participants completed three cognitive tasks before and after sleep deprivation lasting 12 hours and 36 hours. For all three tasks, young adults significantly declined during total sleep deprivation while older adults did not change significantly.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
A study (#0363) involving Sleep Heart Health Study participants used direct measures of sleep fragmentation to show that increases in specific sleep stage transitions during the night are associated with higher mortality risk. This association was found in middle-aged and older adults who had more objectively measured wake to non-rapid eye movement (NREM) sleep transitions per hour of sleep, and in participants who had more NREM to wake transitions. Over the average follow-up period of eight years, 854 of the 5,614 participants died (15.2 percent).
A study (#0373) involving a national sample of older Americans shows that more than 55 percent reported sleeping for an average of seven hours or less per night during the past month. But only 18 percent reported that they “often” or “almost always” feel “unrested during the day.” The average age of the 1,570 participants was 71.9 years.
Another study (#0420) reports that older adults (between 59 and 82 years of age) showed more resiliency to total sleep deprivation than younger adults (between 19 and 38 years of age) on a range of measures of cognitive performance. Participants completed three cognitive tasks before and after sleep deprivation lasting 12 hours and 36 hours. For all three tasks, young adults significantly declined during total sleep deprivation while older adults did not change significantly.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Sleep Promotes Academic Success
A study (# 0312) that will be presented later this morning as a poster found that reports of better sleep across both the weekdays and the weekend appear to be positively associated with educational success.
The study involved 56 students between 14 and 18 years of age. Each of them had complaints of daytime sleepiness and/or insufficient sleep at night.
Although higher sleep quality and sleep efficiency tended to be related to higher overall grades, specific subjects were related to different sleep measures. Higher math scores were related to fewer awakenings, less time in bed, higher sleep efficiency and better sleep quality. Higher English scores were associated with fewer awakenings during the night, and both English and history scores were associated with less difficulty awakening in the morning.
Another study (#0161) presented yesterday reported that being a “night owl” or “evening type” is associated with lower academic performance in college and a decline in academic performance from high school to college.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
The study involved 56 students between 14 and 18 years of age. Each of them had complaints of daytime sleepiness and/or insufficient sleep at night.
Although higher sleep quality and sleep efficiency tended to be related to higher overall grades, specific subjects were related to different sleep measures. Higher math scores were related to fewer awakenings, less time in bed, higher sleep efficiency and better sleep quality. Higher English scores were associated with fewer awakenings during the night, and both English and history scores were associated with less difficulty awakening in the morning.
Another study (#0161) presented yesterday reported that being a “night owl” or “evening type” is associated with lower academic performance in college and a decline in academic performance from high school to college.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
It’s Complicated: Sleep, Marriage & Relationships
Three studies that will be presented later this morning as posters examine the association between sleep and a couple’s relationship.
One study (#1248) reports that being stably married or gaining a partner is associated with better subjective sleep quality and objective sleep efficiency than being unmarried or losing a partner. The study’s lead author presented similar findings last year at SLEEP 2008, reporting that marital happiness may lower the risk of sleep problems in Caucasian women, while marital strife may heighten the risk. Read a press release about last year’s study. Earlier in 2009 in the journal Behavioral Sleep Medicine, the same team published their finding that happily married women reported fewer sleep disturbances, with the association evident among Caucasian women and to a lesser extent among African-American women.
Another study (#1295) involving 159,856 participants found that sleep disturbance is associated with being unmarried. The rates of self-reported sleep disturbance classified by marital status were 16.3 percent for married, 21.2 percent for divorced, 21.3 percent for never married, 22.8 percent for unmarried couple, 25.4 percent for widowed and 30.7 percent for separated. “Sleep disturbance” was defined as seven or more days of having trouble falling asleep, staying asleep or sleeping too much over the last two weeks. Less education, lower income and being unemployed also were associated with sleep disturbance.
A third study (#1285) reports that bidirectional associations appear to exist between sleep quality and interpersonal interactions of co-sleeping couples. Sleep problems at night may have a negative impact on relationship satisfaction the following day, while daytime interactions may influence the quality of sleep that night.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
One study (#1248) reports that being stably married or gaining a partner is associated with better subjective sleep quality and objective sleep efficiency than being unmarried or losing a partner. The study’s lead author presented similar findings last year at SLEEP 2008, reporting that marital happiness may lower the risk of sleep problems in Caucasian women, while marital strife may heighten the risk. Read a press release about last year’s study. Earlier in 2009 in the journal Behavioral Sleep Medicine, the same team published their finding that happily married women reported fewer sleep disturbances, with the association evident among Caucasian women and to a lesser extent among African-American women.
Another study (#1295) involving 159,856 participants found that sleep disturbance is associated with being unmarried. The rates of self-reported sleep disturbance classified by marital status were 16.3 percent for married, 21.2 percent for divorced, 21.3 percent for never married, 22.8 percent for unmarried couple, 25.4 percent for widowed and 30.7 percent for separated. “Sleep disturbance” was defined as seven or more days of having trouble falling asleep, staying asleep or sleeping too much over the last two weeks. Less education, lower income and being unemployed also were associated with sleep disturbance.
A third study (#1285) reports that bidirectional associations appear to exist between sleep quality and interpersonal interactions of co-sleeping couples. Sleep problems at night may have a negative impact on relationship satisfaction the following day, while daytime interactions may influence the quality of sleep that night.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Tuesday, June 9, 2009
Nightmares & Other Parasomnias
Two studies being presented later this morning as posters focus on parasomnias – undesirable physical events or experiences that occur during entry into sleep, within sleep or during arousals from sleep.
One study (#0600) reports that the prevalence of parasomnia symptoms in patients with obstructive sleep apnea is higher than the prevalence rates of individual parasomnias in the general population. Of 537 adult participants with OSA, 51 (9.5 percent) had at least one type of parasomnia complaint; in the general population, the reported prevalence of common parasomnias is 2 percent to 5 percent. The most commonly reported complaints were sleep paralysis, sleep-related hallucinations and symptoms suggestive of REM sleep behavior disorder.
Another study (#1120) found that self-reported nightmares by adult patients seeking emergency psychiatric evaluation uniquely predicted elevated suicidal symptoms. Results indicate that after controlling for depression, the severity of self-reported disturbing dreams and nightmares independently predicted higher scores for suicide ideation as a non-significant trend; insomnia severity scores were no longer associated with suicide ideation after controlling for depression. The results suggest that nightmares may be an acute warning sign and risk factor for suicide.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
One study (#0600) reports that the prevalence of parasomnia symptoms in patients with obstructive sleep apnea is higher than the prevalence rates of individual parasomnias in the general population. Of 537 adult participants with OSA, 51 (9.5 percent) had at least one type of parasomnia complaint; in the general population, the reported prevalence of common parasomnias is 2 percent to 5 percent. The most commonly reported complaints were sleep paralysis, sleep-related hallucinations and symptoms suggestive of REM sleep behavior disorder.
Another study (#1120) found that self-reported nightmares by adult patients seeking emergency psychiatric evaluation uniquely predicted elevated suicidal symptoms. Results indicate that after controlling for depression, the severity of self-reported disturbing dreams and nightmares independently predicted higher scores for suicide ideation as a non-significant trend; insomnia severity scores were no longer associated with suicide ideation after controlling for depression. The results suggest that nightmares may be an acute warning sign and risk factor for suicide.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Teen Bedtimes Associated with Suicide, Depression & Grades
Two studies being presented as posters later this morning examine the negative impact of late bedtimes on teens.
One study (#1064) suggests that parental-mandated bedtimes could help protect teens from depression and suicidal thoughts by lengthening sleep duration. Results show that adolescents with parental-mandated bedtimes at midnight or later were 25 percent more likely (adjusted odds ratio 1.25) to suffer from depression and 20 percent more likely (adjusted odds ratio 1.20) to have suicidal ideation compared with adolescents who had parental-mandated bedtimes of 10 p.m. or earlier. Multivariate models show that sleep duration may have acted as a mediator of these associations; thus short sleep may be a risk factor for depression and suicidal ideation.
Another study (#0161) shows that being a “night owl” or “evening type” – preferring to go to bed late at night and wake up later in the day – is associated with lower academic performance in college and a decline in academic performance from college to high school. Results indicate that evening types had significantly lower first year college GPA (2.84) than “morning types” and “intermediate types” (3.18). They also slept on average 41 minutes less on school nights. For all students, “sleep hygiene” was related to academic performance.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
One study (#1064) suggests that parental-mandated bedtimes could help protect teens from depression and suicidal thoughts by lengthening sleep duration. Results show that adolescents with parental-mandated bedtimes at midnight or later were 25 percent more likely (adjusted odds ratio 1.25) to suffer from depression and 20 percent more likely (adjusted odds ratio 1.20) to have suicidal ideation compared with adolescents who had parental-mandated bedtimes of 10 p.m. or earlier. Multivariate models show that sleep duration may have acted as a mediator of these associations; thus short sleep may be a risk factor for depression and suicidal ideation.
Another study (#0161) shows that being a “night owl” or “evening type” – preferring to go to bed late at night and wake up later in the day – is associated with lower academic performance in college and a decline in academic performance from college to high school. Results indicate that evening types had significantly lower first year college GPA (2.84) than “morning types” and “intermediate types” (3.18). They also slept on average 41 minutes less on school nights. For all students, “sleep hygiene” was related to academic performance.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Obstructive Sleep Apnea in Non-Obese Patients
The major predisposing factor for obstructive sleep apnea is excess body weight. But a study (#0565) being presented as a poster later this morning confirms a high prevalence of OSA in non-obese, adult patients who were referred to a sleep center for overnight polysomnography; the primary cause for referral was a complaint of excessive daytime sleepiness.
Each patient was 18 years of age or older; 57 percent were men. Patients were considered non-obese if they had a body mass index (BMI) of 18.5 to 27. Results show that OSA was diagnosed in 2,906 of the 5,426 non-obese patients (54 percent) who were evaluated by polysomnography at one of 18 sleep centers.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Each patient was 18 years of age or older; 57 percent were men. Patients were considered non-obese if they had a body mass index (BMI) of 18.5 to 27. Results show that OSA was diagnosed in 2,906 of the 5,426 non-obese patients (54 percent) who were evaluated by polysomnography at one of 18 sleep centers.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Wired Teens, Sleep Loss & Obesity
A study (#0320) being presented as a poster later this morning shows that excessive use of technology by children and teens may be related to both sleep loss and obesity. The study involved 320 students between the ages of 10 and 18 years. Results show that children who had more hours of “screen time” (TV, Internet, computer and video games) got less sleep and consumed more caffeine. Having a shorter sleep duration was associated with a higher body mass index (BMI).
A similar study (#0200) was presented yesterday and published in the June issue of the journal Pediatrics. Read a summary of the study on the Sleep Education Blog.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
A similar study (#0200) was presented yesterday and published in the June issue of the journal Pediatrics. Read a summary of the study on the Sleep Education Blog.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Treating Insomnia without Drugs
Two studies being presented as posters later this morning show that non-pharmacological treatments for insomnia can be effective.
One study (#0821) concludes that when applied in a “real world” clinical setting, cognitive behavioral therapy for insomnia appears to be an effective treatment approach for various types of chronic insomnia such as sleep-onset insomnia and sleep-maintenance insomnia. Treatment produced significant improvements on presenting complaints as well as other measures such as sleep efficiency, average nightly awakenings, total sleep time and average nights of sleep medication use per week.
A small pilot study (#0874) involving 11 adults with chronic primary insomnia shows that another effective behavioral intervention may be Kriya Yoga – a type of meditation that combines different yoga techniques. Results indicate that sleep latency, total sleep time, total wake time, wake after sleep onset, sleep efficiency, sleep quality and depression improved in patients who practiced meditation for two months.
In 2006 the American Academy of Sleep Medicine published, “Practice Parameters for the Psychological and Behavioral Treatment of Insomnia: An Update” in the journal SLEEP. View the practice parameters online.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
One study (#0821) concludes that when applied in a “real world” clinical setting, cognitive behavioral therapy for insomnia appears to be an effective treatment approach for various types of chronic insomnia such as sleep-onset insomnia and sleep-maintenance insomnia. Treatment produced significant improvements on presenting complaints as well as other measures such as sleep efficiency, average nightly awakenings, total sleep time and average nights of sleep medication use per week.
A small pilot study (#0874) involving 11 adults with chronic primary insomnia shows that another effective behavioral intervention may be Kriya Yoga – a type of meditation that combines different yoga techniques. Results indicate that sleep latency, total sleep time, total wake time, wake after sleep onset, sleep efficiency, sleep quality and depression improved in patients who practiced meditation for two months.
In 2006 the American Academy of Sleep Medicine published, “Practice Parameters for the Psychological and Behavioral Treatment of Insomnia: An Update” in the journal SLEEP. View the practice parameters online.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Insomnia Linked to Diabetes Risk
A study (#0866) being presented later this morning as a poster indicates that insomnia with short sleep duration is associated with an increased risk of diabetes. Yesterday the same research team presented an abstract (#0868) showing that chronic insomnia with objective short sleep duration in men also is associated with an increased risk for mortality.
In the April 1 issue of the journal SLEEP, the researchers also published a study showing that chronic insomnia with objectively measured short sleep time is an independent and clinically significant risk factor for hypertension. Read an AASM press release about the study.
According to the authors, these results indicate that objective sleep duration may predict the medical severity of chronic insomnia, and they suggest that the medical impact of insomnia has been previously underestimated.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
In the April 1 issue of the journal SLEEP, the researchers also published a study showing that chronic insomnia with objectively measured short sleep time is an independent and clinically significant risk factor for hypertension. Read an AASM press release about the study.
According to the authors, these results indicate that objective sleep duration may predict the medical severity of chronic insomnia, and they suggest that the medical impact of insomnia has been previously underestimated.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Monday, June 8, 2009
The Genetics of Insomnia in Children & Teens
A study (#0808) being presented later this morning as a poster examined the genetic heritability of insomnia in a sample of twins. Results show a moderate heritability in children between 8 and 16 years of age, with significant genetic effects shared between insomnia, depression and anxiety. This suggests that overlapping genetic mechanisms may underlie these three disorders and may help explain why insomnia is so common in people who have depression and anxiety.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Sleep, Diet & Exercise
Two studies being presented today address the relationships between sleep, diet and exercise.
A study (#1277) being presented later this morning as a poster reports the surprising finding that regular daily exercise did not correlate with total sleep time. Instead, the study found that sleep improved after days of low exertion, and better-rested participants got less exercise and had less calorie expenditure. Possible explanations for these unexpected findings include differences in personality types and the influence of job and life stress.
A study (#0385) being presented this afternoon as an oral presentation found that sleep-restricted participants gained weight over the 11 days of the study even though they reported a decrease in appetite, food cravings and food consumption. The results suggest that energy intake still exceeded energy expenditure during sleep restriction in the sedentary environment of the laboratory.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
A study (#1277) being presented later this morning as a poster reports the surprising finding that regular daily exercise did not correlate with total sleep time. Instead, the study found that sleep improved after days of low exertion, and better-rested participants got less exercise and had less calorie expenditure. Possible explanations for these unexpected findings include differences in personality types and the influence of job and life stress.
A study (#0385) being presented this afternoon as an oral presentation found that sleep-restricted participants gained weight over the 11 days of the study even though they reported a decrease in appetite, food cravings and food consumption. The results suggest that energy intake still exceeded energy expenditure during sleep restriction in the sedentary environment of the laboratory.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Improving CPAP Compliance for Sleep Apnea
Two studies being presented as posters later this morning address issues related to patient compliance with continuous positive airway pressure (CPAP) therapy for obstructive sleep apnea.
One study (#0582) shows that some problem-solving and coping styles contribute to successful CPAP use. These include seeking advice and information from other people, and creating goal-oriented schedules.
Another study (#0576) shows that a spouse or cohabiting partner’s involvement can help improve CPAP compliance. The most effective methods of helping were “bilateral tactics,” which involve a collaborative effort to work together.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
One study (#0582) shows that some problem-solving and coping styles contribute to successful CPAP use. These include seeking advice and information from other people, and creating goal-oriented schedules.
Another study (#0576) shows that a spouse or cohabiting partner’s involvement can help improve CPAP compliance. The most effective methods of helping were “bilateral tactics,” which involve a collaborative effort to work together.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Insomnia Linked to Mortality
A study (#0868) being presented later this morning as a poster reports that insomnia with short sleep duration in men is associated with increased mortality. In women with insomnia and short sleep duration, the mortality risk was increased but not statistically significant.
In the April 1 issue of the journal SLEEP, the same research team also published a study showing that chronic insomnia with objectively measured short sleep time is an independent and clinically significant risk factor for hypertension. Read an AASM press release about the study.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
In the April 1 issue of the journal SLEEP, the same research team also published a study showing that chronic insomnia with objectively measured short sleep time is an independent and clinically significant risk factor for hypertension. Read an AASM press release about the study.
You can download the SLEEP 2009 abstract supplement as an 11 MB file in PDF format.
Sunday, June 7, 2009
Research Will Take Center Stage at SLEEP 2009
Beginning on Monday, June 8, more than 1,300 research abstracts will be presented during the scientific program at SLEEP 2009, showcasing the latest findings in sleep research from around the world.
The majority of the abstracts will be on display as poster presentations from 10:15 a.m. to 12:15 p.m. Pacific Time, Monday, June 8, to Wednesday, June 10. Each poster will be displayed for one day only. Abstract authors will be available at their posters to discuss their findings with meeting attendees.
Select abstracts will be presented as brief oral presentations during scheduled sessions from Monday, June 8, to Thursday, June 11. Sessions involve a common theme and consist of either four abstract presentations during a one-hour session, or eight presentations during a two-hour session. Each oral presentation is 10 minutes long and is followed by five minutes of questions from the audience.
Eight “late-breaking abstracts” were selected for presentation during a special session from 10:15 a.m. to 12:15 p.m. on Thursday, June 11. These oral presentations involve high-quality, emerging data found between December 2008 and March 2009.
The abstracts being presented at SLEEP 2009 were recently published in a special supplement of the journal SLEEP. You can download the abstract supplement as a 11 MB file in PDF format.
SLEEP 2009 will begin with the plenary session from 8 a.m. to 10 a.m. Pacific Time on Monday. Look for live updates to be posted to the SLEEP 2009 blog until the meeting ends at 12:15 p.m. on Thursday, June 11.
The majority of the abstracts will be on display as poster presentations from 10:15 a.m. to 12:15 p.m. Pacific Time, Monday, June 8, to Wednesday, June 10. Each poster will be displayed for one day only. Abstract authors will be available at their posters to discuss their findings with meeting attendees.
Select abstracts will be presented as brief oral presentations during scheduled sessions from Monday, June 8, to Thursday, June 11. Sessions involve a common theme and consist of either four abstract presentations during a one-hour session, or eight presentations during a two-hour session. Each oral presentation is 10 minutes long and is followed by five minutes of questions from the audience.
Eight “late-breaking abstracts” were selected for presentation during a special session from 10:15 a.m. to 12:15 p.m. on Thursday, June 11. These oral presentations involve high-quality, emerging data found between December 2008 and March 2009.
The abstracts being presented at SLEEP 2009 were recently published in a special supplement of the journal SLEEP. You can download the abstract supplement as a 11 MB file in PDF format.
SLEEP 2009 will begin with the plenary session from 8 a.m. to 10 a.m. Pacific Time on Monday. Look for live updates to be posted to the SLEEP 2009 blog until the meeting ends at 12:15 p.m. on Thursday, June 11.
Wednesday, June 11, 2008
Snack Attack: Short Sleep Promotes an Increase in Snacking
A study (ID# 0355) being presented as a poster presentation this afternoon at SLEEP 2008 shows that people who restrict their sleep are likely to increase the amount of snacks they eat. The authors conclude that this behavior may contribute to the increased risk of weight gain and obesity associated with short sleep hours.
The study involved 11 healthy volunteers with an average age of 39 years. Caloric intake was monitored for 14 days when sleep was restricted to 5.5 hours in bed each night, and for 14 days of 8.5 hours in bed each night.
Results show that meal intake remained similar in the two conditions, but subjects consumed more energy from snacks during the period of sleep restriction. The carbohydrate content of snacks also increased during restricted sleep.
Energy expenditure was comparable during the two sleep conditions, as were the levels of leptin and ghrelin, two hormones involved in appetite regulation.
According to the American Academy of Sleep Medicine, most adults need about seven to eight hours of sleep each night.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
The study involved 11 healthy volunteers with an average age of 39 years. Caloric intake was monitored for 14 days when sleep was restricted to 5.5 hours in bed each night, and for 14 days of 8.5 hours in bed each night.
Results show that meal intake remained similar in the two conditions, but subjects consumed more energy from snacks during the period of sleep restriction. The carbohydrate content of snacks also increased during restricted sleep.
Energy expenditure was comparable during the two sleep conditions, as were the levels of leptin and ghrelin, two hormones involved in appetite regulation.
According to the American Academy of Sleep Medicine, most adults need about seven to eight hours of sleep each night.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
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