Sleep quality, sleep duration and physical activity in obese adolescents: effects of exercise training.
BACKGROUND
Decreased sleep duration and altered sleep quality are risk factors for obesity in youth. Structured exercise training has been shown to increase sleep duration and improve sleep quality.


OBJECTIVE
This study aimed at evaluating the impact of exercise training for improving sleep duration, sleep quality and physical activity in obese adolescents (OB).


METHODS
Twenty OB (age: 14.5 ± 1.5 years; body mass index: 34.0 ± 4.7 kg m(-2) ) and 20 healthy-weight adolescents (HW) completed an overnight polysomnography and wore an accelerometer (SenseWear Bodymedia) for 7 days. OB participated in a 12-week supervised exercise-training programme consisting of 180 min of exercise weekly. Exercise training was a combination of aerobic exercise and resistance training.


RESULTS
Sleep duration was greater in HW compared with OB (P < 0.05). OB presented higher apnoea-hypopnoea index than HW (P < 0.05). Physical activity (average daily metabolic equivalent of tasks [METs]) by accelerometer was lower in OB (P < 0.05). After exercise training, obese adolescents increased their sleep duration (+64.4 min; effect size: 0.88; P = 0.025) and sleep efficiency (+7.6%; effect size: 0.76; P = 0.028). Physical activity levels were increased in OB as evidenced by increased steps per day and average daily METs (P < 0.05). Improved sleep duration was associated with improved average daily METs (r = 0.48, P = 0.04).


CONCLUSIONS
The present study confirms altered sleep duration and quality in OB. Exercise training improves sleep duration, sleep quality and physical activity.
University Grenoble Alpes, HP2, F-38000, Grenoble, France.|INSERM, HP2, F-38000, Grenoble, France.|CHU de Grenoble, HP2, F-38000, Grenoble, France.
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Mendelson
University Grenoble Alpes, HP2, F-38000, Grenoble, France.|INSERM, HP2, F-38000, Grenoble, France.|CHU de Grenoble, HP2, F-38000, Grenoble, France.
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Borowik
University Grenoble Alpes, HP2, F-38000, Grenoble, France.|INSERM, HP2, F-38000, Grenoble, France.|CHU de Grenoble, HP2, F-38000, Grenoble, France.
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Michallet
CHU de Grenoble, Department of Pediatrics, F-38000, Grenoble, France.
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Perrin
University Grenoble Alpes, HP2, F-38000, Grenoble, France.|INSERM, HP2, F-38000, Grenoble, France.|CHU de Grenoble, HP2, F-38000, Grenoble, France.|CHU, Hôpital A. Michalon, Département de Biochimie, Toxicologie et Pharmacologie, F-38000, Grenoble, France.
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Monneret
University Grenoble Alpes, HP2, F-38000, Grenoble, France.|INSERM, HP2, F-38000, Grenoble, France.|CHU de Grenoble, HP2, F-38000, Grenoble, France.|CHU, Hôpital A. Michalon, Département de Biochimie, Toxicologie et Pharmacologie, F-38000, Grenoble, France.
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Faure
University Grenoble Alpes, HP2, F-38000, Grenoble, France.|INSERM, HP2, F-38000, Grenoble, France.|CHU de Grenoble, HP2, F-38000, Grenoble, France.
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Levy
University Grenoble Alpes, HP2, F-38000, Grenoble, France.|INSERM, HP2, F-38000, Grenoble, France.|CHU de Grenoble, HP2, F-38000, Grenoble, France.
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Pépin
University Grenoble Alpes, HP2, F-38000, Grenoble, France.|INSERM, HP2, F-38000, Grenoble, France.|CHU de Grenoble, HP2, F-38000, Grenoble, France.
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Wuyam
University Grenoble Alpes, HP2, F-38000, Grenoble, France.|INSERM, HP2, F-38000, Grenoble, France.|CHU de Grenoble, HP2, F-38000, Grenoble, France.
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Flore
D000293:Adolescent; D015992:Body Mass Index; D001835:Body Weight; D005081:Exercise Therapy / Q000379:methods*; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D063766:Pediatric Obesity / Q000517:prevention & control* / Q000523:psychology; D005082:Physical Exertion; D017286:Polysomnography; D015397:Program Evaluation; D012307:Risk Factors; D012890:Sleep; D016896:Treatment Outcome; D061217:Weight Reduction Programs / Q000379:methods*
adolescent; exercise training; obesity; sleep