Short sleepers more likely to catch cold  

Washington, Sep 1 (IANS) People who sleep six hours a night or less are more likely to catch cold, says a study.

The findings published in the US journal Sleep, added to growing evidence of the importance of sleep for health, reported Xinhua news agency.

“It goes beyond feeling groggy or irritable,” lead author Aric Prather, assistant professor of psychiatry at the University of California, San Francisco, said. “Not getting enough sleep affects your physical health.”

For the study, 164 adults underwent two months of health screenings and interviews to establish baselines for factors like stress, temperament, and alcohol and cigarette use.

The researchers tracked their sleep patterns for seven days using a watch-like sensor that measured the duration and quality of sleep throughout the night.

Then, the participants were sequestered in a hotel, administered the cold virus via nasal drops and monitored for a week, collecting daily mucus samples to see if the virus had taken hold.

They found that subjects who slept less than six hours a night were 4.2 times more likely to catch the cold compared to those who got more than seven hours of sleep.

Those who slept less than five hours were 4.5 times more likely to catch the cold.

“Sleep goes beyond all the other factors that were measured,” Prather said. “It did not matter how old people were, their stress levels, their race or education. With all those things taken into account, statistically sleep still carried the day and was an overwhelmingly strong predictor for susceptibility to the cold virus.”

Scientists have long known that sleep is important for our health, with poor sleep linked to chronic illnesses, disease susceptibility and even premature death.

Prather’s previous studies have shown that people who sleep fewer hours are less protected against illness after receiving a vaccine.

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