Night coffee stops the internal clock

Scientists figured out how coffee is drunk at night affects the human biorhythms. The researchers experienced the method could prove invigorating drink for 40 minutes "freezes" the internal clock.

In addition experts believe that the abuse of coffee can turn "larks" in "owls". British and American scientists was the first to prove the theory that coffee stops the biological clock inhabitant of our planet. Foreign researchers took as a basis the famous all, invigorating qualities of the drink and based on scientific data explained why after coffee the person doesn't want to sleep.

In the process several experiments Kenneth Wright from the Institute of Colorado and his colleagues have found why one Cup of coffee helps (or hinders) us not to fall asleep while night duty and exam preparation. Professionals conducted a series of experiments in which he participated, 5 volunteers.

Researchers asked people on the planet 50 days to live in specialized areas. The rooms were arranged in such a way that in the evening there was very little light, informs the website of "Komsomolskaya Pravda" . Moreover before bedtime subjects were given vitamins on the basis of caffeine, which is the ratio of active drug to answer one Cup of coffee.

Then scientists started to watch in the evening hours, the body begins to respond to the caffeine, and that at this point it happens with human biorhythms. The researchers collected saliva samples, and measured the amount of melatonin, the sleep hormone. In addition they watched how fast the coffee is no longer valid and that happens with sleep.

After analysis of the acquired data, an English scientist could prove that caffeine stops the biological clock in the human body is 40 minutes. This is manifested in the decrease of the sleep hormone, the absence of which gives a person courage. A similar effect of coffee seems to be at the time "freezes" the biological clock.

A similar effect is invigorating drink allows you to postpone sleep and give about an hour of vigor, but the coffee at night can also harm your biorhythms. According to the researchers, if not to produce melatonin a few days, the internal clock inhabitant of our planet irreversibly "get off" and he starts to fall asleep later and without the support of the caffeine. In consequence, over time the "early birds" who drink coffee at night, could be transformed into a full-fledged "owls".

sections: Society