Need to sleep at least 6 hours a day, according to U.S. scientists from the University of California. They conducted a study involving 164 people and found that lack of sleep increases the likelihood of getting sick with colds, especially in autumn and winter.
Scientists have recorded the sleep of volunteers, the presence of harmful habits. Each subject underwent a complete medical examination. People who slept less than six hours a day, respiratory diseases were significantly more likely to be those who sleep paid for seven hours or more. Sleep less than five hours increased the likelihood of colds by almost five times.
Other factors (alcohol, cigarettes, ethnicity) played no role in the development of colds. Lack of sleep, experts say, the main factor in the reduction of immunity.