On January 1, a joint research group of Professor Nao Uchida of Waseda University School of Sport Sciences and Kao Healthcare Food Research Institute said that shortening sleep time affects appetite such as a decrease in appetite-suppressing hormones and an increase in hunger, resulting in obesity. Announced that it has elucidated the mechanism of increasing risk.

 For human sleep, previous epidemiological studies have shown that shorter sleep times increase the risk of obesity, but the mechanism by which sleep time affects human energy metabolism has not been clarified.

 This time, the research group conducted a study of the effects of halving sleep on human energy metabolism in nine young healthy men using a metabolic chamber.

 The results showed that shortening sleep time did not significantly change daily energy expenditure despite increased nighttime energy expenditure.On the other hand, it was clarified that shortening sleep time affects appetite such as a decrease in appetite-suppressing hormone and an increase in hunger.This result is believed to support the previous findings that reduced sleep time leads to obesity.

 In the future, the policy is to aim for research to investigate the interrelationship between energy intake such as food intake, sleep time, and activity amount in more detail.

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