![\"sleep](\"http:\/\/therapytoronto.ca\/news\/wp-content\/uploads\/2013\/07\/sleep-deprivation.jpg\")
Sleep deprivation may result in people consuming more calories during the following day, according to a systematic review and meta-analysis led by researchers at King’s College London.<\/p>\n
The meta analysis combined the results of many previous small intervention studies to produce a more robust answer and found that sleep-deprived people consumed an average of 385 kcal per day extra, which is equivalent to the calories of about four and a half slices of bread<\/strong>.<\/p>\n The study, published today in the European Journal of Clinical Nutrition<\/em>, combined the results of 11 studies with a total of 172 participants. The analysis included studies that compared a partial sleep restriction intervention with an unrestricted sleep control and measured the individuals’ energy intake over the next 24 hours.<\/p>\n They found partial sleep deprivation did not have a significant effect on how much energy people expended in the subsequent 24 hours<\/strong>. Therefore, participants had a net energy gain of 385 calories per day.<\/p>\n The researchers also found there was a small shift in what sleep deprived people ate — they had proportionately higher fat and lower protein intakes<\/strong>, but no change in carbohydrate intake.<\/p>\n Dr Gerda Pot, senior author from the Diabetes & Nutritional Sciences Division at King’s College London and Vrije Universiteit Amsterdam, said: ‘The main cause of obesity is an imbalance between calorie intake and expenditure and this study adds to accumulating evidence that sleep deprivation could contribute to this imbalance<\/strong>. So there may be some truth in the saying ‘early to bed, early to rise, makes a man healthy and wise’. This study found that partial sleep deprivation resulted in a large net increased energy intake of 385 kcal per day. If long-term sleep deprivation continues to result in an increased calorie intake of this magnitude, it may contribute to weight gain.<\/p>\n ‘Reduced sleep is one of the most common and potentially modifiable health risks in today’s society in which chronic sleep loss is becoming more common<\/strong>. More research is needed to investigate the importance of long-term, partial sleep deprivation as a risk factor for obesity and whether sleep extension could play a role in obesity prevention.’<\/p>\n A previous small study in 26 adults found partial sleep deprivation resulted in greater activation of areas in the brain associated with reward when people were exposed to food. A greater motivation to seek food could be an explanation for the increased food intake seen in sleep deprived people in this study, the authors suggest. Other possible explanations include a disruption of the internal body clock affecting the body’s regulation of leptin (the ‘satiety’ hormone) and ghrelin (the ‘hunger’ hormone)<\/strong>.<\/p>\n The amount of sleep restriction varied between the studies, with the sleep deprived participants sleeping between three and a half and five and a half hours in the night. The control subjects spent between seven and 12 hours in bed<\/strong>.<\/p>\n The authors suggest that more intervention studies are needed into the effect of increased sleep duration over longer periods in everyday life on weight gain and obesity<\/strong>, as most of the studies included in this analysis were in controlled laboratory conditions over periods of one day to two weeks.<\/p>\n Haya Al Khatib, lead author and PhD candidate at King’s College London, said: ‘Our results highlight sleep as a potential third factor, in addition to diet and exercise, to target weight gain more effectively<\/strong>. We are currently conducting a randomised controlled trial in habitually short sleepers to explore the effects of sleep extension on indicators of weight gain.’<\/p><\/blockquote>\n <\/p>\n","protected":false},"excerpt":{"rendered":" From the King’s College London media release: Sleep deprivation may result in people consuming more calories during the following day, according to a systematic review and meta-analysis led by researchers… Read more »<\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[344,339,351,43,338],"tags":[42,385,362],"_links":{"self":[{"href":"https:\/\/therapytoronto.ca\/news\/wp-json\/wp\/v2\/posts\/19321"}],"collection":[{"href":"https:\/\/therapytoronto.ca\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/therapytoronto.ca\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/therapytoronto.ca\/news\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/therapytoronto.ca\/news\/wp-json\/wp\/v2\/comments?post=19321"}],"version-history":[{"count":2,"href":"https:\/\/therapytoronto.ca\/news\/wp-json\/wp\/v2\/posts\/19321\/revisions"}],"predecessor-version":[{"id":19350,"href":"https:\/\/therapytoronto.ca\/news\/wp-json\/wp\/v2\/posts\/19321\/revisions\/19350"}],"wp:attachment":[{"href":"https:\/\/therapytoronto.ca\/news\/wp-json\/wp\/v2\/media?parent=19321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/therapytoronto.ca\/news\/wp-json\/wp\/v2\/categories?post=19321"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/therapytoronto.ca\/news\/wp-json\/wp\/v2\/tags?post=19321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}