Clipping Board » Life Tips ─ Life is also a subject of study...
Update Date: 2010/08/02 00:07 [AFP Washington, August 1st]
The latest research shows that people who sleep more or less than seven hours a day, including naps, have a higher risk of cardiovascular disease, which is the leading cause of death in the United States.
A study by the West Virginia University (WVU) School of Medicine found that those who sleep less than five hours a day, including naps, are more than twice as likely to be diagnosed with angina, coronary heart disease, heart attack, or stroke compared to those who sleep normally. The report was published in the journal *Sleep*.
The study also indicated that sleeping more than seven hours increases the risk of cardiovascular disease.
The research found that respondents who slept nine hours or more per day had a 1.5 times higher risk of cardiovascular disease compared to those who slept seven hours.
The most at-risk group was individuals under 60 who slept less than five hours per night. Their risk of cardiovascular disease was more than three times higher than those who slept seven hours.
Women who slept less than five hours a day, including naps, had a 2.5 times higher risk of cardiovascular disease than average.
The study showed that too little sleep triggers angina, while heart disease and stroke are linked to both too much and too little sleep.
Another study also published in *Sleep* suggested that for those who must sleep less, occasional extended sleep can be beneficial.
Research by David Dinges, head of the Sleep and Chronobiology Unit at the University of Pennsylvania School of Medicine, found that 142 participants who slept little for five workdays had slower reaction times and poorer concentration.
However, after a night of extended sleep, these sleep-deprived participants showed significant improvement. Those who slept only four hours per night during the week and then slept ten hours straight experienced the most noticeable benefits.
Dinges said, "After chronic sleep loss, catching up with an extra hour or two in the morning can help restore alertness and performance."
Source: http:/ / tw. news. yahoo. com/ art……rl/ d/ a/ 100802/ 128/ 2aas6. html
7 Hours of Sleep is Just Right
The latest research shows that people who sleep more or less than seven hours a day, including naps, have a higher risk of cardiovascular disease, which is the leading cause of death in the United States.
A study by the West Virginia University (WVU) School of Medicine found that those who sleep less than five hours a day, including naps, are more than twice as likely to be diagnosed with angina, coronary heart disease, heart attack, or stroke compared to those who sleep normally. The report was published in the journal *Sleep*.
The study also indicated that sleeping more than seven hours increases the risk of cardiovascular disease.
The research found that respondents who slept nine hours or more per day had a 1.5 times higher risk of cardiovascular disease compared to those who slept seven hours.
The most at-risk group was individuals under 60 who slept less than five hours per night. Their risk of cardiovascular disease was more than three times higher than those who slept seven hours.
Women who slept less than five hours a day, including naps, had a 2.5 times higher risk of cardiovascular disease than average.
The study showed that too little sleep triggers angina, while heart disease and stroke are linked to both too much and too little sleep.
Another study also published in *Sleep* suggested that for those who must sleep less, occasional extended sleep can be beneficial.
Research by David Dinges, head of the Sleep and Chronobiology Unit at the University of Pennsylvania School of Medicine, found that 142 participants who slept little for five workdays had slower reaction times and poorer concentration.
However, after a night of extended sleep, these sleep-deprived participants showed significant improvement. Those who slept only four hours per night during the week and then slept ten hours straight experienced the most noticeable benefits.
Dinges said, "After chronic sleep loss, catching up with an extra hour or two in the morning can help restore alertness and performance."
Source: http:/ / tw. news. yahoo. com/ art……rl/ d/ a/ 100802/ 128/ 2aas6. html