WASHINGTON — Sleeping too much or not enough may have bad effects on health, according to the study appears in the journal BMC Public Health.
Researchers at Seoul National University College of Medicine found that sleeping fewer than six hours a night or more 10 hours a night increases your risk for metabolic syndrome — a cluster of symptoms (high blood pressure, high blood sugar, excess body fat around the waist, and abnormal cholesterol levels, for example) that increase your risk for heart disease, stroke, and diabetes.
For the study researchers compared to individuals who slept six to seven hours per day, men who slept fewer than six hours were more likely to have metabolic syndrome and higher waist circumference.
Women who slept fewer than six hours were more likely to have higher waist circumference. The authors found that nearly 11 percent of men and 13 percent of women slept less than six hours, while 1.5 percent of men and 1.7 percent of women slept more than ten hours.
“This is the largest study examining a dose-response association between sleep duration and metabolic syndrome and its components separately for men and women. Because we were able to expand the sample of our previous study, we were able to detect associations between sleep and metabolic syndrome that were unnoticed before,” said Claire E Kim, lead author of the study.
“We observed a potential gender difference between sleep duration and metabolic syndrome, with an association between metabolic syndrome and long sleep in women and metabolic syndrome and short sleep in men.”
Based on common definitions, participants were considered to have metabolic syndrome if they showed at least three of the following: elevated waist circumference, high triglyceride levels, low levels of ‘good’ cholesterol, hypertension, and high fasting blood sugar. The prevalence of metabolic syndrome was just over 29 percent in men and 24.5 percent in women.
The authors suggest that as the prevalence of metabolic syndrome in Korea is high, it is critical to identify modifiable risk factors such as sleep duration.
With Agency Inputs
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