Coffee is probably the most famous drink in the world. Many people work a lot, and they do not even have enough time to get the recommended number of sleep hours.
Therefore, most of us tend to rely on coffee. Indeed, this drink can boost your energy level so that you can deal with a busy day. Unfortunately, the latest research has shown that coffee stops being efficient if you get three nights in a row without a good sleep.
It means that coffee can help you stay awake as long as you are well rested. A team of scientists from the American Academy of Sleep Medicine and the Sleep Research Society has discovered that caffeine gives you almost no benefit if you get three nights with just a few hours of sleep.
Therefore, many people ask themselves what is the point of drinking coffee if it has no effect. Well, the answer is that this drink helps you function better only as long as you rest enough every night or at least every two nights.
According to Tracy Jill Doty, lead author of the study and scientist at Walter Reed Army Institute of Research in Silver Spring, caffeine is the most used stimulant to improve performance and alertness after a period of sleep restrictions. In other words, these results are valuable as they will offer a correct perspective regarding the use of this drink.
Doty also underlined that the daily dose of caffeine cannot tackle the tiredness you feel after more than two days of restricted sleep. Some 48 healthy volunteers participated in the study. Then, scientists restricted their sleep to five hours every night for five nights in a row.
Twice a day the participants were given 200 milligrams of caffeine or a placebo which was inactive. It means that the standard cup of coffee has 95 milligrams. Furthermore, the volunteers received mental skills tests every hour during the time they were awake.
Based on the results, the group that took caffeine had better results during the first two days that the one that took an inactive placebo. Nevertheless, during the next three days, the daily coffee dose proved to be ineffective.
According to the United States Centers for Disease Control and Prevention, adults need at least seven to eight hours of sleep every night. Therefore, coffee proves to be effective only if you hit the recommended number of sleep time.