Sugar cravings worsened by lack of sleep

A new study has found that sugar cravings are worsened by lack of sleep and following and maintaining a good diet to maintain healthy weight would necessitate a good night’s rest.

The study titled “Sleep extension is a feasible lifestyle intervention in free-living adults who are habitually short sleepers: a potential strategy for decreasing intake of free sugars? A randomised controlled pilot study”, was published in the latest issue of the American Journal of Clinical Nutrition published this week (10th January 2018).

The researchers from King’s College, London, included a mere 42 healthy adults in their study. They were divided into two groups and then trained one of the groups in good sleeping practices. These volunteers were counseled to increase their night’s rest by up to 1.5 hours. Good sleep advice also included avoidance of caffeine before sleep time and also starting on a relaxing routine. Going to bed too full as well as going to bed hungry, both are to be avoided for a good night’s sleep. The other group was not given any such advice and continued their usual sleep routine. Over one week all the participants recorded their sleep timings and routines as well as their dietary habits. They wore motion sensors on their person during the week. It recorded the amount of time they spent sleeping and the amount of time they spent in bed before falling asleep.

At the end of the study the results were quite interesting. The treatment group that successfully increased their sleep hours were found to consume less sugar on the day after. Heavy sleepers in fact could reduce their sugar intake by up to 10 grams in a day. These individuals had a less craving for sugar and carbohydrates compared to those who stuck to their earlier sleep routines. Results showed that 86 percent of the participants who were given sleep advice could successfully increase their total time spent in bed. Half of these participants could increase their sleep duration by approximately 52 to 90 minutes each night compared to the other group. Three of the participants from the sleep-advice group achieved their recommended 7-9 hours of sleep as well.

Wendy Hall, a senior lecturer in the Department of Diabetes and Nutritional Sciences at King's College London and a senior author of the study, said sugars that they measured for this study included sugars added to cooking as well as those added by manufacturers to food such as syrups etc. They also included other sugary substances such as fruit juices and honey in their assessment. She said that sleeping well was a simple lifestyle change that could help people to eat healthier.

This study also helps researchers understand the importance of poor sleep habits and schedules and its association with the rise in sugar and carbohydrate consumption. Haya Al Khatib, lead researcher of the study and a professor from in the Department of Nutritional sciences at King's College London, added that only raising total bed time duration by an hour or so was necessary to making better and healthier food choices. She added that it has already been studied previously that poor sleep meant poor diets. This study just strengthens the findings that improving sleep improves diet. She added that getting good sleep is of public health importance as poor sleep is linked to several health concerns.

Studies have shown that over a third of all Americans get less than 6 hours of sleep per night. The recommended duration of sleep for healthy adults is around 7 to 9 hours of undisturbed sleep.

Reference: ‘Sleep extension is a feasible lifestyle intervention in free-living adults who are habitually short sleepers: a potential strategy for decreasing intake of free sugars? A randomised controlled pilot study’ is published on Wednesday 10 January 2018 in the American Journal of Clinical Nutrition DOI: 10.1093/ajcn/nqx030 and https://academic.oup.com/ajcn/advance-article/doi/10.1093/ajcn/nqx030/4794751

Dr. Ananya Mandal

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Dr. Ananya Mandal

Dr. Ananya Mandal is a doctor by profession, lecturer by vocation and a medical writer by passion. She specialized in Clinical Pharmacology after her bachelor's (MBBS). For her, health communication is not just writing complicated reviews for professionals but making medical knowledge understandable and available to the general public as well.

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