Associations between nocturnal sleep duration, midday nap duration and body composition among adults in Southwest China

Autoři: Mengxue Chen aff001;  Xiao Zhang aff001;  Yi Liang aff001;  Hongmei Xue aff002;  Yunhui Gong aff003;  Jingyuan Xiong aff001;  Fang He aff001;  Yanfang Yang aff001;  Guo Cheng aff005
Působiště autorů: West China School of Public Health and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, P.R. China aff001;  College of Public Health, Hebei University, Baoding, P. R. China aff002;  Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University) of Ministry of Education, Chengdu, P. R. China aff003;  Department of Obstetrics and Gynecology, Longquanyi District of Chengdu Maternity & Child Health Care Hospital, Chengdu, P. R. China aff004;  West China School of Public Health and Healthy Food Evaluation Research Center and State Key Laboratory of Biotherapy and Cancer Center, Sichuan University, Chengdu, P.R. China aff005
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: 10.1371/journal.pone.0223665



We aim to explore the relationship between nocturnal sleep duration (NSD) and midday nap duration (MND) with body composition among Southwest Chinese adults.


Data on sleep duration of 3145 adults in Southwest China (59.4% women) were obtained between 2014 and 2015 through questionnaires. Height, weight, and waist circumference (WC) were measured to calculate body composition (body mass index (BMI), percentage of body fat (%BF), and fat mass index (FMI)). Linear regression models were used to assess gender-specific associations between NSD and body composition. The relationship between MND with the odds of overweight and central obesity has been evaluated by logistic regression models.


NSD has the inverse relation with males’ BMI, WC, %BF and FMI after adjusting for all covariates (all P <0.0007), exclusive of females’ (all P >0.4). After adjustment for potential confounders, compared to the subjects in the no midday nap group, the subjects who napped 0.1–1 hour were independently associated with a less prevalence of overweight in both women (OR: 0.72, 95%CI: 0.55–0.95) and men (OR: 0.71, 95%CI: 0.52–0.98). MND was not associated with central obesity.


Among Southwest Chinese adults, lower NSD might be related to higher BMI, WC, %BF and FMI among men. Additionally, MND is associated with overweight in adults.

Klíčová slova:

Adipose tissue – Adults – Body mass index – Educational attainment – Exercise – Obesity – Physical activity – Sleep


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