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Core Tip: Many people said that they could refresh to start working after drinking a cup of tea when they are tired. But recent British study found that coffee has no effect to refresh, it is just psychological effect. University of East London looked for an 88 18-year-old to 47 years old people who drink coffee more than two cups to do the experiences. They are divided into two groups, one group was told they drank decaffeinated coffee, but they actually drink was general coffee; another group was adverse. After drinking a cup of coffee, they were asked to take the test to test their attention, reaction time and mood and so on. The results showed that the group who thought they have drank the coffee have the better attention and reaction. The researchers said that from the experimental point of view, coffee cannot raise the attention of coffee itself, but people who think they drank coffee has the psychological dependence, so their attention is more concentrated. Why people have the different feelings after a cup of coffee in the morning? Researchers said it probably because this cup of coffee reverse the “fatigue effect” that they do not have the caffeine. If people drink coffee for a long time, it will make people tired. Caffeine can stimulate the nerves, which make people arrive the effect of the excitement. Bristol University researchers found that people who often drink caffeinated beverages will gradually produce "resistance" for this kind of stimulus. Researchers studied 379 adults as investigation, half of them never or rarely drink caffeinated beverages, and half people often drink these drinks. The researchers asked them do not to drink within 16 hours of caffeinated beverages, and then let them drink coffee or no practical effect of the placebo. The researchers assessed and found the degree of excitement of people who often drink the caffeinated beverages is similar with the people who do not often drink the caffeinated beverages. The researchers believe that if people drink coffee for a long time, it will people feel tired. If you drink coffee in the morning, it could let the level of excitement to return back the normal levels. John is a completely experienced game player. He often can buy much game gold at the lowest price in sell rift plat and sell rift gold.
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