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New research suggests that a lack of sleep can cause dehydration by disrupting the release of an essential hormone to regulate hydration.
Sleep deprivation has a wide range of adverse effects on a person's health.
Not only does poor sleep impair attention and judgment, but prolonged sleep deprivation increases the risk of type 2 diabetes, hypertension, obesity and respiratory illnesses. .
More recently, some studies have shown that insomnia increases the risk of kidney disease and premature death. The kidneys play a vital role in hydration, and drinking more water improves the health of the kidneys.
However, few studies have examined the effects of sleep deprivation on the body's hydration levels. New research aimed to fill this gap. The head of the study was Asher Rosinger, Ph.D., assistant professor of biological health behavior at Pennsylvania State University at State College.
The new study, which examines the effects of lack of sleep on hydration levels in American and Chinese adults, was recently published in the journal Sleep.
Rosinger and his colleagues analyzed available data from two large studies: the National Health and Nutrition Survey and the Chinese Kailuan Study.
Overall, researchers examined the records of more than 20,000 healthy young adults who had provided urine samples and completed questionnaires about their sleep patterns.
The scientists examined in urine two markers of dehydration: density and osmolality. Rosinger and the team also applied logistic regression models to assess the relationship between hydration and sleep duration.
They found that people who slept regularly less than 6 hours a night had more concentrated urine than those who slept about 8 hours a night. "A short duration of sleep was associated with a higher likelihood of inadequate hydration in children. [American] and Chinese adults, compared to 8 hours of sleep, "explain the authors.
Specifically, those who reported sleeping regularly 6 hours or less per night were between 16 and 59% more likely to be dehydrated than those sleeping 8 hours per night. These results apply to both population samples.
Finally, the study found no association with 9 hours of sleep or more per night.
In commenting on the results, the senior author stated, "If you only sleep 6 hours a night, this can affect your hydration state." He added:
"This study suggests that if you do not get enough sleep and that you feel bad or tired the next day, drink more water," said Asher Rosinger.
Although the new study is purely observational and does not prove causality, researchers believe that vasopressin hormone could be responsible for the link between lack of sleep and lack of hydration.
Vasopressin is an antidiuretic hormone that controls the body's water balance during the day and at night.
"Vasopressin is released more quickly and later in the sleep cycle," explained Rosinger, adding, "If you wake up earlier, you may miss this window in which a larger portion of the hormone is released, which disrupts the body. hydration. "
The authors should note that researchers should further evaluate the relationship between dehydration and sleep deprivation. Longitudinal studies, for example, can determine baseline hydration levels and re-examine them after a week of insufficient sleep.
Dehydration has various negative effects on health. This can cause muscle weakness, headaches and fatigue. Dehydration can also impact mood and impair cognition.
Posted in Daily Times, November 8th 2018.
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