Showing posts with label fatigue. Show all posts
Showing posts with label fatigue. Show all posts

Friday, October 30, 2015

Health effects of sleep apnea

This article discusses the effects of sleep apnea beyond snoring.

According to the American Sleep Apnea Association, about 22 million Americans have sleep apnea and about 80 percent of those cases are undiagnosed. Sleep apnea is an involuntary sleep disorder in which breathing repeatedly stops and starts.

Sleep apnea can occur when tissue in the back of the throat blocks the airway. If the airway is blocked, the amount of oxygen delivered to the body’s organs is reduced. When blood-oxygen levels drop low enough, the body wakes itself up. Sometimes it happens so fast that it goes unnoticed to the sleeper. People with sleep apnea can stop breathing hundreds of times during the night and often for a minute or longer.

Sleep apnea can have serious and life-shortening consequences if it is not treated. These include high blood pressure, heart disease, stroke, memory problems, diabetes and depression.

Symptoms of sleep apnea:

  • loud snoring
  • fatigue
  • insomnia
  • persistent daytime sleepiness
  • awakening out of breath during the night
  • frequently waking in the morning with a dry mouth or a headache

The most widely used treatment for sleep apnea is a Continuous Positive Airway Pressure (CPAP) machine. The CPAP has a mask that goes over the nose, or sometimes nose and mouth, during sleep and supplies pressurized air that flows into the person’s throat. The increased air pressure keeps the airway open. Sometimes people still struggle with sleep apnea even after they use a CPAP. In those cases, surgery may be needed.

Sleep apnea is sometimes caused by the back of the tongue or tonsils blocking the airway. In these cases, an uvulopalatopharyngoplasty (UVPPP) is required. UVPPP involves shortening the soft palate and removing the tonsils, and it has been the most common sleep apnea surgical procedure performed in the past 25 years. In addition, robotic-assisted resection of the base of tongue is a minimally invasive approach to remove obstructive tongue tissue blocking the airway. After this surgery, sleep apnea is often corrected. At Long Beach Memorial, the da Vinci Si Robotic Surgical System is used to remove redundant tongue tissue and is performed in conjunction with the UVPPP to help our patients get a good night’s rest.

In order to properly diagnose sleep apnea, a physician must conduct a sleep study in a sleep lab, usually overnight. A sleep study monitors activity during sleep such as measuring brain waves, heart rate and rhythm, breathing patterns and oxygen levels.

Read more here

Sunday, April 13, 2014

Risks of sleep apnea - stroke, heart attack, pneumonia, dementia.

This article discusses the risks associated with untreated sleep apnea. My only comment for this article  is that "Sleep hygiene" does NOT treat sleep apnea. - JR


Sleep Apnea: The Real Risks Involved

"18 million Americans suffer from it. It can lead to both physical and psychological problems. Perhaps you, as many do, have it and aren’t even aware of it.
Sleep apnea is a sleep disorder that is characterized by snoring and pauses in breathing at night, waking the person momentarily before they fall back asleep. This disruption of sleep can occur several times a night, 5 to 30 times or more in just one hour. A person, both adults and children alike, can suffer from this disorder for years, even decades, before realizing it.
Studies have shown that sleep apnea can lead to problems like irritability, daytime fatigue, depression, hypertension, heart attack, and stroke, but recent studies have shown that the risks are actually more serious than, well, a heart attack. And while obesity can lead to this disorder, the disorder itself can lead to obesity.
The authors of a review posted in The Lancet Diabetes & Endocrinology journal wrote, “Metabolic health … is largely dependent on behavioral factors such as dietary habits and physical activity. In the past few years, sleep loss as a disorder characterizing the 24-hour lifestyle of modern societies has increasingly been shown to represent an additional behavioral factor adversely affecting metabolic health.”
...
“Our findings show that sleep apnea is an independent risk factor for incident pneumonia,” theysaid. “Our results also demonstrated an exposure-response relation in patients with more severe sleep apnea may have a higher risk of pneumonia than patients with sleep apnea of milder severity.”
Heart disease, dementia, diabetes … the negative effects continue to mount up. However, along with the worrisome research comes some hope.
Continuous positive airway pressure devices, or CPAP machines, are currently the most common treatment out there. They consist of a plastic facial mask, which the patient wears at night, connected by a flexible tube to a small bedside machine. Using air pressure, it keeps the patient’s airways open during sleep.
“We know that obstructive sleep apnea is a potential cause of high blood pressure, and we know that CPAP use is associated with reductions in blood pressure in people with hypertension,” sayssleep specialist Vishesh K. Kapur, MD. “And now there is reasonable evidence that this treatment can prevent high blood pressure in patients who don’t already have it.”
Modern CPAP machines also come with a built-in humidifier to help prevent dryness in the throat/nasal passages."
...

Read more here

Sunday, March 16, 2014

Fibromyalgia may be a sleep disorder

A neurologist can detect alpha intrusion on a sleep study. JR

A study claims that fibromyalgia syndrome may be a sleep disorder, or at least linked to one.

Nobody says, "I don't believe hypertension exists," or "I don't believe 'stroke' is a real thing." People with fibromyalgia syndrome (FMS) suffer not only from constant widespread pain, but they also sometimes face judgment and distrust from medical professionals who doubt if their condition is real. They are labeled as annoying and needy. In the literal sense, insult is added to injury.
The root cause of FMS is poorly understood, which may explain why its legitimacy is questioned by some healthcare professionals. FMS is characterized by chronic widespread musculoskeletal pain, stiffness, and tenderness at multiple points. The prevalence of FMS ranges from 2 percent to 3 percent of the general population, with women affected six to nine times more frequently than men.
In addition to pain symptoms from head to toe, people with FMS also complain of poor sleep, chronic fatigue, depressed mood, headaches, and many other symptoms. However, complaints of poor sleep and chronic fatigue may be more significant to individuals with FMS than pain symptoms. Analysis of slow-wave sleep in individuals with FMS often demonstrates characteristic alpha-wave intrusions in slow wave sleep, which are thought to contribute to poor sleep in this population. Furthermore, a trial using sodium oxybate, a medication known to increase slow-wave sleep, demonstrated improvement in fibromyalgia symptoms.
As the association between FMS and sleep has been further studied, more evidence has mounted that FMS in many cases is a byproduct of a sleep disorder. A 2006 study demonstrated a more than ten-fold increase in FMS in subjects with sleep-disordered breathing (SDB) compared to the normal population.
Research suggests that FMS is a disorder of hypersensitivity of the central nervous system (CNS). The peripheral nervous system (PNS) is constantly sending signals from various areas of the body to the CNS. The CNS then filters these signals, ignoring the insignificant while responding to the more pressing. Due to the hypersensitivity of the CNS in FMS, those lesser signals are not filtered, leading to widespread pain.
Poor sleep quality has a similar effect on CNS signal filtration. Many with chronic pain syndromes (e.g., arthritis) describe improvement in pain with a good night's sleep and vice versa. It is a well-known phenomenon in the neurology community that sleep deprivation is a powerful trigger for seizures. Seizures are caused by inappropriate hyperexcitation of certain neurons leading to a cascade of electrical discharges in the cerebral cortex that overcome (or "seize") the function of that region of the brain.
Diagnosis and treatment of SDB and other chronic sleep conditions can lead to significant improvement in FMS independent of any other therapy. However, since the overwhelming majority of FMS sufferers are women, and many women with SDB have more subtle airflow disruptions than their male counterparts, it is essential that testing be sensitive enough to detect these less obvious changes. Those who have had a prior negative sleep study or who do not snore should seek a sleep center that focuses on diagnosing and treating subtle SDB, such as Upper Airway Resistance Syndrome. Esophageal manometry can be used to measure intrathoracic pressure during sleep. This metric can help detect increased respiratory effort and subtle changes in airflow during sleep that can cause sleep fragmentation and that otherwise would be missed.
FMS sufferers with poor sleep may experience frequent nighttime arousals, tossing and turning in bed, morning headaches, nasal congestion in the morning that was not present upon going to bed, dry mouth during the night, episodes of waking up with palpitations, teeth clenching or grinding at night, temperomandibular joint (TMJ) or jaw pain in the morning, and acid reflux during the night or in the morning. While these are not specific signs independently, they all are suggestive of irregular breathing during sleep.
So for the four to six million Americans suffering from FMS, perhaps it's time to see a sleep specialist. A proper night's sleep just might cure what ails you.
Read more here

Sunday, March 02, 2014

Chronic fatigue syndrome in men and women

Chronic fatigue syndrome, once considered a men's disease, now is known to be present in both men and women.

Previously long-term fatigue was considered a male disorder caused by societal pressures. Today women comprise the majority of these patients, and they feel that their condition is their own fault. Not only has the fatigued patient changed gender. Previously doctors believed that long-term fatigue was a neurological, physical disorder, while today it is categorized primarily as psychological in nature. And while in the past, society was thought to be the cause of the disorder, today the individual is supposedly to blame.
Throughout history some people have suffered from a lack of energy and long-term, physical fatigue. Today these symptoms are classified as myalgic encephalomyelitis (ME) or chronic fatigue syndrome (CFS).
It is commonly thought that chronic fatigue has mainly psychological causes and that it affects perfectionistic women who cannot live up to their own unreasonably high standards.
This has not always been the case. Just over 100 years ago it was primarily upper class men in intellectual professions who were affected. "Neurasthenia," as the condition was called at the time, was a physical diagnosis with high status.
No longer legitimate
"The medical understanding of long-term fatigue has changed. Previously the condition was viewed as a typically male disorder; now it is perceived as a typically female disorder. The diagnosis of neurasthenia, which has a male connotation, was changed to the ME diagnosis, which has a female connotation," explains Olaug S. Lian, a sociologist and professor at UiT The Arctic University of Norway.
Together with Hilde Bondevik of the University of Oslo, Lian has studied how the view of women and perceptions of the body, gender and femininity in two different historical periods have been manifested in the medical understanding of long-term chronic fatigue.
"Long-term fatigue was viewed as a legitimate disorder, a result of the heroic efforts of the upper class male. Today, it is a stigmatizing disorder, understood as an expression of women's lack of ability to cope with their lives, a kind of breach of character," says Lian.
Not only has the fatigued patient changed gender. Previously doctors believed that long-term fatigue was a neurological, physical disorder, while today it is categorized primarily as psychological in nature. And while in the past, society was thought to be the cause of the disorder, today the individual is supposedly to blame.
What happened to cause this change?
Upper class diagnosis
At the end of the 1800s neurasthenia was the most widespread diagnosis for long-term fatigue. Neurologists believed the condition was caused by a physical, neurological disease that affected the entire body, causing intense, long-term fatigue.
Although women were also diagnosed with the disorder, the typical patient was a man, and not just any kind of man. He was "civilized, refined, and educated, rather than of the barbarous and low-born and untrained," according to neurologist George Beard.
Society was to blame
Doctors at the time believed that the cause of the disorder could be found in a rapidly changing society -- urbanization, industrialization and women's entry into working life.
Quite simply, modern civilization ran roughshod over the nervous system of upper class men, who were overstimulated by too much pressure and activity and too little sleep and rest.
"It was regarded as both legitimate and understandable that even the 'great men' could fall apart as a result of long-term, difficult intellectual work. It was viewed as positive that the body sent signals when the burden was too great. The body was viewed as an electrical fuse box and the thinking was that it was better for one fuse to burn out rather than for the house to catch on fire," says Lian.
Different genders, different causes
The comments about the diagnosis also revealed past understandings of biological gender differences. Women could get neurasthenia from sexual frustration, while men could get it from excessive sexual activity, including masturbation.
Moreover, there was a connection between gender and class.
"To simplify a bit, we can say that it was mainly middle class men and working class women whose diagnosis of neurasthenia was explained by overwork. For working class men it was due to sexual escapades, and for middle class women the cause given was heredity or 'women's issues'," explains Lian.
The fall of neurasthenia
Neurasthenia lost its popularity as a diagnosis in the early 1900s. One reason for this was that psychiatry became a medical field in its own right.
"Psychiatry took neurasthenia with it and changed its definition from a physical to a psychological condition. Since women were regarded as psychologically weaker and therefore more disposed to mental illness, the disorder became a female problem," says Lian.
Fight over definitions
Today ME is the most common name for the disorder, defined as long-term, intense fatigue that cannot be directly linked to a well-defined illness and that does not disappear with rest. The condition is chronic, it cannot be cured with medical treatment and there is disagreement as to the cause.
"The lack of scientifically generated findings, medical explanations and effective treatment make ME a diagnosis with low status and low legitimacy within the medical community," says Lian.
Currently the main theory is that ME results from an inability to handle stress and that perfectionistic people -- the "good girls" -- are especially at risk. The debate about how ME should be understood and explained is highly polarized, between those who believe that it is an illness caused by infections or vaccination and those who believe that ME has mainly psychological causes.
"I would like to see some humility about what we actually know about the disorder and not present value judgments as facts. Doctors must also be honest and acknowledge that we have very little hard-and-fast knowledge about this condition," states Lian.
Blame and shame
The two historical periods have almost identical depictions of the phenomenon of long-term fatigue, although the names are different. But there is one important difference: the disorder is no longer regarded as a legitimate, anticipated outcome of overwork.
"Today the medical community is searching for explanations of ME at the individual level. The ME patient is depicted as a woman with five-star goals and four-star abilities -- with character traits that make it hard for them to cope with their own lives," says Lian.
"When the entire problem is seen as the patient's fault, the person experiences blame and shame because it is the patient, not society, who is the cause of the illness. It is therefore the individual who is responsible for coping with the illness, such as by changing her own thought patterns," says Lian.
Wrong kind of tired
She points out that the ability to cope with one's own life is an important value in Western culture. Mental disorders, however, are associated with weakness. The current understanding of long-term fatigue is also linked to how we think about tiredness, according to Lian.
"There are strong norms for when you are allowed to be tired and worn out and how you are supposed to show tiredness in daily life. If you have been awake all night with a sick infant, you have a good reason to be tired at work. Other reasons are less legitimate. Workplace reports of absence never state that someone is at the psychologist, while it is completely acceptable to say that someone is at the dentist."
"Being tired for the wrong reasons is seen as a sign of weakness, which must be overcome and hidden. It is in this context that we must understand the medical theories on a lack of coping ability and the objections of ME patients to these theories," says Lian.
She believes such norms often make ME patients feel that the psychological explanation is a burden, although doctors do not necessarily mean for it to have this affect.
"What is it about the ME debate that makes the opposing sides so obstinate?"
"The doctors and patients talk past each other. The doctors think that an ME diagnosis is value neutral, but the patient hears 'it's my fault that I am sick and it's my responsible to get better'. But although most people feel that mental disorders have lower value than somatic disorders, it is not a given that the doctors do," says Lian.
Gendered explanation disappeared?
Although about three of four people who are diagnosed with ME today are women, the explicit, biology-based gendered explanations have disappeared from the debate, according to Lian.
"This may simply be because today we put greater focus on gender equality -- which makes it less legitimate to claim that women are naturally inferior to men," says Lian.
However, she believes that the ME diagnosis embodies a view of women that has long historical roots.
"The profile of the upper class woman from the 1800s who cannot cope with pressure and stress both inside and outside the home is still with us today," says Lian.
Cultural bias
"How can your analysis contribute to the current debate about ME?"
"We show how the medical understanding of fatigue and lack of energy is impacted by the norms and values of society at large, for example, that medical knowledge reflects the view of women in our culture. Norms and values combine with biomedical knowledge in a way that makes it difficult to see what is what," says Lian.
Read more here

Sunday, February 23, 2014

Sleep apnea in MS patients

Recent findings show that sleep apnea can increase fatigue in  multiple sclerosis (MS) patients.

Sleep apnea is common in people with multiple sclerosis and may contribute to their fatigue, a new study shows.
Fatigue is one of the most frequent and debilitating symptoms experienced by MS patients.
The study included 195 people with MS who completed a sleep questionnaire and were assessed for daytime sleepiness, insomnia, fatigue severity and sleep apnea.
One-fifth of the patients had been diagnosed with sleep apnea and more than half were found to have an elevated risk for the condition. The researchers also found that sleep apnea risk was a significant predictor of fatigue severity.
According to the American Academy of Sleep Medicine (AASM), sleep apnea involves decreased or periodic stoppage of airflow during sleep. As muscles relax, soft tissue at the back of the throat may collapse and block the upper airway. Most people with the condition snore loudly.
MS is a chronic, frequently disabling disease that attacks the central nervous system, according to the National Multiple Sclerosis Society. Symptoms range widely, from mild signs such as numbness in the limbs to severe symptoms including paralysis or loss of vision.
The new findings suggest that sleep apnea may be a common but under-recognized contributor to fatigue in MS patients, and doctors should not hesitate to check these patients for sleep problems, study author Dr. Tiffany Braley, an assistant professor of neurology at the University of Michigan Multiple Sclerosis and Sleep Disorders Centers, said in an AASM news release.
"Obstructive sleep apnea is a chronic illness that can have a destructive impact on your health and quality of life," and MS patients at high risk for sleep apnea should undergo a comprehensive sleep evaluation, academy president Dr. M. Safwan Badr said in the news release.
The study appears in the Feb. 15 issue of the Journal of Clinical Sleep Medicine, an AASM publication.
About 400,000 people in the United States have MS, according to the National Multiple Sclerosis Society. Up to 7 percent of men and 5 percent of women have sleep apnea, according to the AASM.
Read more here

Thursday, February 13, 2014

Blue light can fight fatigue during the day

A study shows that blue light from phones and computers can alleviate fatigue throughout the day.

Researchers from Brigham and Women's Hospital (BWH) have found that exposure to short wavelength, or blue light, during the biological day directly and immediately improves alertness and performance. These findings are published in the February issue ofSleep.
"Our previous research has shown that blue light is able to improve alertness during the night, but our new data demonstrates that these effects also extend to daytime light exposure," said Shadab Rahman, PhD, a researcher in BWH's Division of Sleep Medicine and lead author of this study. "These findings demonstrate that prolonged blue light exposure during the day has an an alerting effect."
In order to determine which wavelengths of light were most effective in warding off fatigue, the BWH researchers teamed with George Brainard, PhD, a professor of neurology at Thomas Jefferson University, who developed the specialized light equipment used in the study. Researchers compared the effects of blue light with exposure to an equal amount of green light on alertness and performance in 16 study participants for 6.5 hours over a day. Participants then rated how sleepy they felt, had their reaction times measured and wore electrodes to assess changes in brain activity patterns during the light exposure.
The researchers found that participants exposed to blue light consistently rated themselves as less sleepy, had quicker reaction times and fewer lapses of attention during the performance tests compared to those who were exposed to green light. They also showed changes in brain activity patterns that indicated a more alert state.
"These results contribute to our understanding of how light impacts the brain and open up a new range of possibilities for using light to improve human alertness, productivity and safety," explained Steven Lockley, PhD, neuroscientist at BWH and senior investigator of the study. "While helping to improve alertness in night workers has obvious safety benefits, day shift workers may also benefit from better quality lighting that would not only help them see better but also make them more alert."
Researchers note that the next big challenge is to figure out how to deliver better lighting. While natural light is ideal, many people do not have access to daylight in their schools, homes or work places. In addition to improvements in daylight access, the advent of new, more controllable lighting technologies may help enable researchers to develop 'smart' lighting systems designed to maximize the beneficial effects of light for human health, productivity and safety.
Read more here

Sunday, September 15, 2013

The best beauty tip is to get enough sleep

Sleep deprivation results in physical changes in the face to indicate tiredness. To avoid this, people need to get adequate sleep.

A small new study now confirms that your best beauty trick is to get a good night's sleep.

Findings revealed what you've probably seen in the mirror after a rough night: sleep-deprived people look more, shall we say, worn-out, with redder, more swollen eyes, darker under-eye circles, more wrinkles and droopier eyelids and mouths than their well-rested selves.

People also looked sadder when sleep-deprived than after a normal sleep, and this apparent sadness was related to looking fatigued, the researchers said.

"Since faces contain a lot of information on which humans base their interactions with each other, how fatigued a person appears may affect how others behave toward them," said Tina Sundelin, author and doctoral student in the department of psychology at Stockholm University in Stockholm, Sweden. "This is relevant not only for private social interactions, but also official ones such as with health care professionals and in public safety."

To conduct their research, Sundelin and a team from Karolinska Institute in Stockholm recruited 10 subjects, who were photographed on two separate occasions: after eight hours of normal sleep and after 31 hours of sleep deprivation. The photographs were taken in the laboratory at 2:30 pm on both occasions.

Forty participants rated the 20 facial photographs with respect to various facial cues, fatigue, and sadness.

In a separate study announced earlier this year, University Hospitals Case Medical Center in Cleveland, Ohio found that poor sleepers showed "increased signs of skin aging and slower recovery from a variety of environmental stressors," such as ultraviolet radiation, the researchers said.

If you struggle with getting quality beauty sleep, WebMD and the Mayo Clinic offer the following tips to boost your slumber:

Stick to a regular sleep schedule, even on weekends. Eat well, and avoid caffeine in the evenings or overeating before bedtime. Also try sleep accessories, such as a white noise machine or ear plugs, to block out distractions.

Exercise during the day, which can aid sleep, and try to clear your mind from too much clutter before bedtime by writing in a journal beforehand, for example.

Read more here

Sunday, September 01, 2013

Understanding jet lag may help develop drugs to help with time zone changes

A study using jet lagged mice helps researchers determine what makes people slow to adjust to jet lag and may help develop medication to make the transition easier.

New research in mice reveals why the body is so slow to recover from jet lag and identifies a target for the development of drugs that could help us to adjust faster to changes in time zone.
With funding from the Wellcome Trust and F. Hoffmann La Roche, researchers at the University of Oxford, University of Notre Dame and F. Hoffmann La Roche have identified a mechanism that limits the ability of the body clock to adjust to changes in patterns of light and dark. And the team show that if you block the activity of this gene in mice, they recover faster from disturbances in their daily light/dark cycle that were designed to simulate jet-lag.
Nearly all life on Earth has an internal circadian body clock that keeps us ticking on a 24-hour cycle, synchronising a variety of bodily functions such as sleeping and eating with the cycle of light and dark in a solar day. When we travel to a different time zone our body clock eventually adjusts to the local time. However this can take up to one day for every hour the clock is shifted, resulting in several days of fatigue and discombobulation.
In mammals, the circadian clock is controlled by an area of the brain called the suprachiasmatic nuclei (SCN) which pulls every cell in the body into the same biological rhythm. It receives information from a specialised system in the eyes, separate from the mechanisms we use to 'see', which senses the time of day by detecting environmental light, synchronising the clock to local time. Until now, little was known about the molecular mechanisms of how light affects activity in the SCN to 'tune' the clock and why it takes so long to adjust when the light cycle changes.
To investigate this, the Oxford University team led by Dr Stuart Peirson and Professor Russell Foster, used mice to examine the patterns of gene expression in the SCN following a pulse of light during the hours of darkness. They identified around 100 genes that were switched on in response to light, revealing a sequence of events that act to retune the circadian clock. Amongst these, they identified one molecule, SIK1, that terminates this response, acting as a brake to limit the effects of light on the clock. When they blocked the activity of SIK1, the mice adjusted faster to changes in light cycle.
Dr Peirson explains: "We've identified a system that actively prevents the body clock from re-adjusting. If you think about, it makes sense to have a buffering mechanism in place to provide some stability to the clock. The clock needs to be sure that it is getting a reliable signal, and if the signal occurs at the same time over several days it probably has biological relevance. But it is this same buffering mechanism that slows down our ability to adjust to a new time zone and causes jet lag."
Disruptions in the circadian system have been linked to chronic diseases including cancer, diabetes, and heart disease, as well as weakened immunity to infections and impaired cognition. More recently, researchers are uncovering that circadian disturbances are a common feature of several mental illnesses, including schizophrenia and bipolar disorder.
Russell Foster, Director of the recently established Oxford University Sleep and Circadian Neuroscience Institute supported by the Wellcome Trust, said: "We're still several years away from a cure for jet-lag but understanding the mechanisms that generate and regulate our circadian clock gives us targets to develop drugs to help bring our bodies in tune with the solar cycle.Such drugs could potentially have broader therapeutic value for people with mental health issues."
Read more here

Saturday, August 10, 2013

How much sleep you get is not linked to tiredness

A new study claims that how much or how little sleep you get is not an indicated of how tired you feel.

NEW SWEDISH RESEARCH has shown that there is little or no relation between how much sleep people get at night and how fatigued they feel.
“The length of sleep is not a good measurement to analyse whether we get enough sleep or not,” Torbjoern Aakerstedt told AFP of the studies conducted at the Stress Research Institute of Stockholm University.
“It’s genetically conditioned and dependent on age and health,” he said.
Aakerstedt’s team has conducted three different studies, one of which investigated the sleep patterns of nearly 6,000 individuals.
The research suggests that the number of hours slept is of much less importance in determining how a person functions throughout the day.
“If you feel fine and dynamic during the day, you’ve probably slept enough,” said Aakerstedt.
The research, to be published later this year, found the average number of hours slept during a working week is six hours 55 minutes, with an extra hour’s sleep during holidays.
The researcher said that 20-year-olds should sleep eight hours on average, whilst 60-year-olds require only six.
“But there is no general average,” Aakerstedt added. “Twenty-year-olds can sleep even more, but still be tired during the day” as their brain is still developing.
Yet, although more sleep does not mean more energy, no one should sleep too little, as it affects one’s health, he said.
Too little sleep can result in a weak immune system, type 2 diabetes, heart disease, weight gain, workplace incidents and traffic accidents.
Read more here

Monday, January 21, 2013

Chronic Fatigue Syndrome and How It Affects Sleep

This article discusses what chronic fatigue syndrome is, its negative effect on sleep, and research that is being done on this syndrome.


For people with chronic fatigue syndrome, sleep problems are common. Sleep disorders and disruptive and non-refreshing sleep are some of the most frequent complaints from people suffering from chronic fatigue. Chronic fatigue syndrome is a debilitating medical condition. It's also a mysterious -- and historically controversial -- illness.
The basic characteristics of chronic fatigue syndrome include ongoing fatigue that interferes with daily activities, problems with memory and concentration, muscle pain and headaches, and other physical symptoms such as sore throat and tender lymph nodes. People with chronic fatigue also experience feelings of malaise after periods of mental and physical exertion.
The causes of chronic fatigue are unknown. There is no test to determine the presence of the illness. Physicians make a diagnosis based on the presence of a cluster of symptoms over an extended period of time, at least six months, and by ruling out other conditions. For many years, chronic fatigue was considered with skepticism by some in the medical community. There were those who questioned whether chronic fatigue was an illness at all, rather than the consequence of a sleep disorder or a mental health issue. Over the past two decades, chronic fatigue syndrome has won acceptance by the medical establishment. But much about the disorder -- its causes, its mechanisms in the body -- remain largely unknown.
Disrupted sleep is a hallmark of chronic fatigue syndrome. Chronic fatigue is associated with a range of sleep problems, including:
  • Excessive daytime sleepiness
  • Non-restorative sleep (waking feeling tired even after sufficient or prolonged periods of rest)
  • Difficulty falling asleep and staying asleep
  • Sleep disorders such as obstructive sleep apnea, insomnia, and narcolepsy
Despite the frequency with which people with chronic fatigue syndrome experience sleep disturbances, the connection between sleep and chronic fatigue -- like so much else about the disorder -- is not well understood.
Researchers at Australia's Victoria University have conducted a review of research related to sleep and chronic fatigue. Their analysis sheds some light on possible reasons for poor sleep among patients with chronic fatigue.
Sleep complaints are common among chronic fatigue patients, but there is no single or typical sleep experience for people with this disorder. For the past two decades, research has shown high levels of sleep disorders among adults with this condition:
  • Several studies, including this one, have found that more than half of chronic fatigue patients have some type of sleep disorder.
  • This study showed chronic fatigue patients experience greater levels of disrupted sleep than patients with multiple sclerosis.
  • More than 50 percent of chronic fatigue patients in this study had obstructive sleep apnea or sleep-related movement disorders, such as restless leg syndrome.
  • A similar study showed 46 percent of chronic fatigue patients suffered from obstructive sleep apnea
  • This large, population-based study showed nearly 80 percent of chronic fatigue patients experienced un-refreshing sleep, and 20 percent had obstructive sleep apnea or narcolepsy.
An important area of research into the connection between sleep and chronic fatigue looks at the role of pain. The physical pain associated with chronic fatigue may be a significant factor in the sleep problems experienced by people with chronic fatigue. We know that pain and sleep influence each other in multiple ways. Pain can make sleep difficult to achieve and sustain. Lack of sleep, in turn, can make us more sensitive to pain. Studies like this one have shown that pain causes chronic fatigue patients to wake more often throughout the night than either healthy people or those with depression. And one study found that disruption to slow wave sleep in healthy people triggered physical pain and fatigue similar to people with chronic fatigue syndrome. As researchers themselves note, the role of muscle pain in sleep disorders among chronic fatigue sufferers is an area of research that warrants more attention and further study.
There's another body of research that suggests that people with chronic fatigue experience changes to their sleep cycles that could result in less restorative sleep. Studies have shown that people with chronic fatigue may spend less time in slow wave sleep than healthy people. Slow wave sleep occurs during the sleep stages three and four and is the most restorative sleep we can experience. Studies have shown that chronic fatigue patients spend a reduced amount of time in slow wave sleep and in REM sleep than healthy people. To date, there is less evidence for the reduction in REM sleep than in slow wave sleep. The cause of this disturbance to sleep cycles is unclear. However, there is evidence of a possible link between systematic inflammation and disruptions to sleep cycles, particularly to time spent in slow wave sleep. Systemic inflammation in the body is common among chronic fatigue patients and may play a role in the persistent problem of non-refreshing sleep.
Still another area of study suggests that changes to the body's nervous system activity may play a role in the sleep disruptions experienced by people with chronic fatigue. Chronic fatigue patients experience alterations to the functioning of their nervous systems during waking hours, and these can continue during sleep. Several studies have shown that chronic fatigue patients are more likely to experience disruptions to normal nervous system activity during sleep, and this may be affecting the quality of sleep they experience.
There are so many questions that remain unanswered about the relationship between sleep and chronic fatigue syndrome. Why and how does non-restorative sleep occur so frequently? What is the cause -- or effect -- of sleep disorders such as obstructive sleep apnea and restless leg syndrome among people with chronic fatigue? Do the standard measurements of sleep quality work accurately for this group of people?
Here's one thing we do know: Sleep disruptions are a critical component of chronic fatigue syndrome. Answering these and other questions about the role that sleep plays in chronic fatigue could provide some much needed insight into this debilitating illness.
Read more here