The authors of the study, which are described in the magazine “Science Translational Medicine” claim that our actions – including the use of artificial light and drinking coffee – have a huge impact on sleep and biological clock. “Drinking coffee when you are tired, but do not want to sleep is not a good idea” – says Dr. John O’Neill of Medical Laboratory Molecular Biology in Cambridge.
Dr O’Neill led the experiment on cells that were treated with caffeine. In this way, the investigator wanted to see how the ability of cells to maintain the time. We found that caffeine may alter the effects of chemical clocks that operate in every cell of the human body.
In the second part of the study five people were closed 50 days in sleep research laboratory University of Colorado in Boulder. Because that exposure to light is the main factor that controls our biological clock, most of his “imprisonment” volunteers have spent at very low light conditions.
The effect of coffee was responsible roughly half the influence of three hours spent in the bright light at bedtime. Dr. O’Neill described as “speculation” setting hours, after which no longer belongs in the evening to drink coffee, but I personally never drank it after 17:00.
As noted, the results may help treat certain sleep disorders and “synchronized” people who naturally wake up too early (so-called “larks”). On the other hand, in the case of disorders associated with rapid change time zones when traveling by plane from east to west and vice versa drunk at the right time of coffee can accelerate the shift to local time.
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