Sleeping arrangements are as important as diet and exercise to get a balanced body weight. Concluded a series of studies conducted by experts. The study by a team from the University of Chicago shows, lack of sleep can reduce the effects of the diet. When people who are dieting have quality sleep, reduced body weight two times more than dieters who sleep less.

Reaction of sleep deprivation on obesity was also carried out by scientists from Australia about the link between lack of sleep and weight gain. Meanwhile, experts from Columbia University, New York, who observed sleeping habits of 18,000 people found that people who sleep less than four hours per night were 73 percent risk of overweight later in life than people who sleep 7-9 hours every night.

Even people who average 6 hours sleep per night had a risk of obesity by 23 percent. On the other hand, people are getting too much sleep, about 10 hours every night, has a 11 percent risk of suffering from obesity.

The question is, why lack of sleep makes the body weight increased? The experts believe, lack of sleep can interfere with hormones ghrelin and leptin. Both are hormones that regulate hunger and appetite. When we lack sleep, your body will react like when we eat less; leptin levels will fall and ghrelin levels rise. As a result, the stomach will feel hungry and stimulate appetite to eat a diet rich in fat and sugar. Of course this will make weight soared. These hormonal changes also disrupt the metabolism so more fat is stored.

Other studies have shown, lack of sleep will interfere with the body's biological clock or circadian rhythm that regulates glucose and insulin. Sleep deprivation increases the hormone cortisol, a hormone that also regulates the use of energy in the body. High cortisol levels are associated with insulin resistance and high body mass index.

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