In the United States, Wayne University in his research of scientists, a cup of strong coffee in the afternoon, the time of falling asleep in an hour, are delaying the stimulus effect of the coffee takes hours.
One of the participants, researchers, four days before going to bed, and the other 3 hours ago, and the other is 3 pills to sleep. One of 400 milligrams of caffeine pills while others placebos.
The participants were evaluated with cameras that are placed in the homes of sleep patterns. The scientists concluded that the stimulus effect of up to 6 hours of sleep hormone melatonin caffeine can inhibit the secretion of arrival, after 17: 00 coffee for healthy sleep at night smoking proposed.
The survey results are published in the "Journal of Clinical Sleep Medicine".
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