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Posted at: Nov 7, 2018, 4:06 PM; last updated: Nov 7, 2018, 4:06 PM (IST)

Shorter sleep may lead to dehydration

Shorter sleep may lead to dehydration
Photo for representational use only.

Washington, November 7

Adults who sleep just six hours per night -- as opposed to eight -- may have a higher chance of being dehydrated, a study has found.

The findings, published in the journal Sleep, suggest that those who do not feel well after a night of poor sleep may want to consider dehydration -- not simply poor sleep -- as a cause, and drink more water.

Researchers from Pennsylvania State University in the US looked at how sleep affected hydration status and risk of dehydration in US and Chinese adults.

In both populations, adults who reported sleeping six hours had significantly more concentrated urine and 16-59 per cent higher odds of being inadequately hydrated compared to adults who slept eight hours on a regular basis at night.

The cause was linked to the way the body's hormonal system regulates hydration.

A hormone called vasopressin is released to help regulate the body's hydration status.

It is released throughout the day, as well as during nighttime sleeping hours, which is what the researchers focused on for this study.

"Vasopressin is released both more quickly and later on in the sleep cycle," said Asher Rosinger, assistant professor at Pennsylvania State University.

"So, if you're waking up earlier, you might miss that window in which more of the hormone is released, causing a disruption in the body's hydration," said Rosinger.

Dehydration negatively affects many of the body's systems and functions, including cognition, mood, physical performance and others. Long term or chronic dehydration can lead to more serious problems, such as higher risk of urinary tract infections and kidney stones.

"If you are only getting six hours of sleep a night, it can affect your hydration status," Rosinger said.

"This study suggests that if you're not getting enough sleep, and you feel bad or tired the next day, drink extra water," he said. PTI

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