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Busy work and social activities at this time so time-consuming, so many people tend to lack sleep. In fact, the effects of sleep deprivation is not just going to make you drowsy the next day, and so less able to concentrate at work.

Some neuroscientists believe that one purpose of sleep is to give the brain a chance to build and strengthen the connective tissue of nerve. People who used to sleep enough to learn new information more quickly and have a sharper memory. But what would happen if you always sleep deprivation from day to day? Let us try to count one by one.

Lack of sleep will give the effect of short and long term. The immediate effect, when you awake in a state of shock upon hearing the alarm sounds, you'll likely spend the day with a poor mood (1). Over the day, you will feel confused and easily saturated. Sleeping in a short time will also reduce the speed of your reaction (2), thus increasing the risk of car accidents and other disasters.

So what long-term effects? Hours of sleep that occurs regularly reduced and would disrupt the function of your body. One proof, research shows that sleep deprivation can reduce levels of the hormone leptin (3), which helps control the appetite. Consequently, if you are sleep deprived, it is likely you will overeat.

Lack of sleep also increases levels of stress hormones (4), which will force the body to send more glucose into the bloodstream. The body will also become less sensitive to insulin.

That's it? Apparently not. Other studies have shown that sleep deprivation will stop production of certain chemical compounds in the immune system (5), which keeps the body from germs. Later, a study in 2009 also found that people who sleep less than seven hours a day will increase the chances of having the flu (6).

How many actual hours of sleep a day? Six hours? Or even five hours? Apparently, according to other studies, while reducing the share of sleep from eight hours to six hours a day, you will cause a level of chronic inflammation (7). This condition increases the risk of a variety of other problems, including heart attack, stroke, and osteoporosis.

In conclusion, even if you feel strong enough to undergo activity although accustomed to sleeping only five hours a day, think again long-term effects. Try to reduce routine before bedtime is less important, such as watching TV, checking email, reading a book, or chatting on the phone. Slowly, add hours of sleep you half an hour each week so that sufficient quota of seven or eight hours every night. Experts say, a sign that you have enough sleep is if you can wake up on time every day without the help of an alarm.