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Nutrients 2016, 8(11), 751; doi:10.3390/nu8110751

Effect of Six-Month Diet Intervention on Sleep among Overweight and Obese Men with Chronic Insomnia Symptoms: A Randomized Controlled Trial

1
Exercise Health and Technology Center, Shanghai Jiao Tong University, Shanghai 200240, China
2
Department of Health Sciences, University of Jyväskylä, Jyväskylä 40014, Finland
3
Department of Medical Rehabilitation, Oulu University Hospital and Center for Life Course Health Research, University of Oulu, Oulu 90220, Finland
4
VitalMed Research Center, Helsinki Sleep Clinic and Department of Neurosciences, University of Helsinki, Helsinki 00380, Finland
*
Author to whom correspondence should be addressed.
Received: 14 September 2016 / Revised: 11 November 2016 / Accepted: 16 November 2016 / Published: 23 November 2016
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Abstract

Growing evidence suggests that diet alteration affects sleep, but this has not yet been studied in adults with insomnia symptoms. We aimed to determine the effect of a six-month diet intervention on sleep among overweight and obese (Body mass index, BMI ≥ 25 kg/m2) men with chronic insomnia symptoms. Forty-nine men aged 30–65 years with chronic insomnia symptoms were randomized into diet (n = 28) or control (n = 21) groups. The diet group underwent a six-month individualized diet intervention with three face-to-face counseling sessions and online supervision 1–3 times per week; 300–500 kcal/day less energy intake and optimized nutrient composition were recommended. Controls were instructed to maintain their habitual lifestyle. Sleep parameters were determined by piezoelectric bed sensors, a sleep diary, and a Basic Nordic sleep questionnaire. Compared to the controls, the diet group had shorter objective sleep onset latency after intervention. Within the diet group, prolonged objective total sleep time, improved objective sleep efficiency, lower depression score, less subjective nocturnal awakenings, and nocturia were found after intervention. In conclusion, modest energy restriction and optimized nutrient composition shorten sleep onset latency in overweight and obese men with insomnia symptoms. View Full-Text
Keywords: insomnia symptoms; sleep; sleep onset; diet intervention; nutrient; overweight; obesity insomnia symptoms; sleep; sleep onset; diet intervention; nutrient; overweight; obesity
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Tan, X.; Alén, M.; Wang, K.; Tenhunen, J.; Wiklund, P.; Partinen, M.; Cheng, S. Effect of Six-Month Diet Intervention on Sleep among Overweight and Obese Men with Chronic Insomnia Symptoms: A Randomized Controlled Trial. Nutrients 2016, 8, 751.

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