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13th March 2010, Saturday
How sleep loss threatens your health
Many people do not realize that lack of sufficient sleep can trigger mild to potentially life–threatening consequences, from weight gain to a heart attack. Recently I came across an article in the Harvard Health Newsletter (Health Beat) and thought of sharing the information with you all.
Viral infections: Anecdotal evidence supports the belief that when you’re tired and run–down, you’re more likely to get sick. A 2009 study in Archives of Internal Medicine provides some proof. Researchers followed the sleep habits of 153 men and women for two weeks, then quarantined them for five days and exposed them to cold viruses. People who slept an average of less than seven hours per night were three times as likely to get sick as those who averaged at least eight hours.
Weight gain: Not getting enough sleep makes you more likely to gain weight, according to a 2008 review article in the journal Obesity that analyzed observations from 36 different studies of sleep duration and body weight.
This association is especially strong among children. Lack of sufficient sleep tends to disrupt hormones that control hunger and appetite, and the resulting daytime fatigue often discourages you from exercising. Excess weight, in turn, increases the risk of a number of health problems.
Diabetes: A 2009 report in Diabetes Care found a sharp increase in the risk of type 2 diabetes in people with persistent insomnia. People who had insomnia for a year or longer and who slept less than five hours per night had a three-fold higher risk of type 2 diabetes compared with those who had no sleep complaints and who slept six or more hours every night. As with overweight and obesity (which are also closely linked to type 2 diabetes), the underlying cause is thought to involve a disruption of the normal hormonal regulation of the body due to inadequate sleep.
High blood pressure: Researchers involved in the diabetes study also evaluated risk of high blood pressure among the same group of people, which included more than 1,700 randomly chosen men and women from rural Pennsylvania. As described in a 2009 article in the journal Sleep, the researchers found the risk of high blood pressure was three–and–a–half times greater among insomniacs who routinely slept less than six hours per night compared with normal sleepers who slept six or more hours nightly.
Heart disease: A number of studies have linked short–term sleep deprivation with several well–known risk factors for heart disease, including higher cholesterol levels, higher triglyceride levels, and higher blood pressure.
One such report, published in a 2009 issue of Sleep, included more than 98,000 Japanese men and women ages 40 to 79 who were followed for just over 14 years. Compared with women who snoozed for seven hours, women who got no more than four hours of shut–eye were twice as likely to die from heart disease, the researchers found.
Sleep apnea is a common cause of poor sleep, a life–threatening condition in which breathing stops or becomes shallower hundreds of times each night also increases heart disease risk. In the Wisconsin Sleep Cohort study, people with severe sleep apnea were three times more likely to die of heart disease during 18 years of follow–up than those without apnea. When researchers excluded those who used a breathing machine (a common apnea treatment), the risk jumped to more than five times higher. Apnea spells can trigger arrhythmias (irregular heartbeats), and the condition also increases the risk of stroke and heart failure.
Mental illness: A study of about 1,000 adults ages 21 to 30 found that, compared with normal sleepers, those who reported a history of insomnia during an interview were four times as likely to develop major depression by the time of a second interview three years later. Two studies in young people–one involving 300 pairs of young twins, and another including about 1,000 teenagers–found that sleep problems developed before a diagnosis of major depression and (to a lesser extent) anxiety. Sleep problems in teenagers preceded depression 69% of the time and anxiety disorders 27% of the time.
Mortality: In the Japanese heart disease study (described above), short sleepers of both genders had a 1.3–fold increase in mortality compared with those who got sufficient sleep. According to a 2009 study of 6,400 men and women whom researchers followed for an average of eight years, severe sleep apnea raises the risk of dying early by 46%. Although only about 8% of the men in the study had severe apnea, those who did and who were between 40 and 70 years of age were twice as likely to die from any cause as healthy men in the same age group.
It is clear that getting enough sleep is just as important as other vital elements of good health, such as eating a healthy diet, getting regular exercise, and practicing good dental hygiene.
In short, sleep is not a luxury but a basic component of a healthy lifestyle.
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Joseph Jules François Félix Babinski (1857–1932, Paris) was a Polish neurologist. He is best known for his 1896 description of the Babinski sign, a pathological plantar reflex indicative of corticospinal tract damage.
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Will be organized at Maulana Azad Medical College, New Delhi on July 4, 2010, Sunday to commemorate Doctors’ Day. The speakers, chairpersons and panelists will be doctors from NCR, who have been past and present Padma awardees.
The second eMedinewS–revisiting 2010 conference will be held at Maulana Azad Medical College, New Delhi on January 2, 2011. The event will have a day–long CME, Doctor of the Year awards, cultural hungama and live webcast. Suggestions are invited.
NATIONAL SEMINAR ON STRESS PREVENTION (17–18 April) . Over 350 registrations done already.
A Stress Prevention Residential Seminar cum spiritual retreat with Dr KK Aggarwal and Experts from Brahma Kumaris will be organized from April 17–18, 2010.
Co–organizers: eMedinews, Brahma Kumaris, Heart Care Foundation of India, IMA New Delhi Branch and IMA Janak Puri Branch
Venue: Om Shanti Retreat Centre, National Highway 8, Bilaspur Chowk, Pataudi Road, Near Manesar.
Timings: On Saturday 17th April (2 pm onwards) and Sunday 18th April (7 am–4 pm). There will be no registration charges, limited rooms, kindly book in advance; stay and food (satvik) will be provided. Voluntary contributions welcome. For booking e–mail and SMS to Dr KK Aggarwal: 9811090206, firstname.lastname@example.org BK Sapna: 9811796962, email@example.com
Stroke Update Workshop for GPs (Starts today)
Indian Stroke Association and International Stroke Conference are organizing a Stroke Update Workshop on March 13–14, 2010 at AIIMS Auditorium. eMedinewS has tied up with the conference for free registrationS. Organizer: Dr Padma, Prof of Neurology, AIIMS. SMS 9717298178 or email to firstname.lastname@example.org
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