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health care
In general, those who slept only 6 hours, 42 percent more likely to have hypertension, whereas that used to sleep no more than 5 hours a 31 percent higher risk. The study reported in the journal Hypertension.
The new study observed women only, not men. According to study leader, Dr. Francesco P. Cappuccio from Warwick Medical School, Coventry, these findings suggest the possibility of gender-specific relationships, decreased sleep, and blood pressure. Even so, the exact grounds of these findings is unknown.
A number of studies have linked poor sleep quality to increased risk of high blood pressure, diabetes, and heart disease. Many of these studies focused on people with respiratory disorders, sleep apnea (stopping breathing during sleep). However, some evidence suggests, loss of sleep without any obvious interference, also detrimental to health.
For the study, Cappuccio and his colleagues used data from the long-term health study of 10,300 white British civil servants aged 35-55 years. The researchers focused on respondents that are free of high blood pressure in the 1997-1999 phase of the study and were reassessed in 2003-2005.
During the two-phase, 76 and 68 percent, respectively, of the original group were included in the evaluation. At reassessment, 20 percent of respondents recently diagnosed with high blood pressure and the risk is greater among women with short sleep time.
Risk factors for heart disease, such as smoking, being overweight, or sedentary lifestyle, partially contribute to the relationship. Nevertheless, the relationship between sleep and free blood pressure persists.
Experts speculate that the loss of sleep can contribute to high blood pressure. This is because lack of sleep makes the nervous system in a state of hyperactivity, which in turn affects systems throughout the body, including the heart and blood vessels.
According to the team Cappuccio, need more research to confirm that sleep duration affects blood pressure levels, and why these effects may be different in women and men.
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