Relationships between College Students' Sedentary Behavior, Sleep Quality, and Body Mass Index.

Wenxi Liu,Daniel J Mcdonough,Qingwen Peng,Kun Tao,Zan Gao,Qin Yuan,Nan Zeng

doi:10.3390/ijerph18083946

Abstract

Purpose: Sedentary behavior (SB), sleep efficiency (SE), sleep duration (SD), and body mass index (BMI) are crucial determinants of an individual’s health. However, empirical evidence regarding associations between these factors in young adults living in China remains unknown. Therefore, the purpose of this study was to examine the relationships between accelerometer-measured SB, SE, SD, and BMI in Chinese college students. Methods: Two-hundred and twenty college students (115 females, Meanage = 20.29 years, SD = 2.37) were recruited from a south-central Chinese university. Participants’ SB (daily % time spent in SB), SE (number of minutes of sleep duration/number of minutes in bed), and SD were assessed via wrist-worn ActiGraph GT9X Link accelerometers for one week. Body weight was measured using a digital weight scale, height was measured using a stadiometer, and BMI was calculated as weight (kg)/height (m2). Results: Participants’ average time spent in SB was 76.52% (SD = 10.03), SE was 84.12% (SD = 4.79), and BMI was 20.67 kg/m2 (SD = 3.12), respectively. Regression analyses indicated that SB (β = −0.17, p = 0.01) and BMI (β = −0.20, p < 0.01) negatively predicted SE. In addition, BMI negatively predicted SD (β = −0.22, p < 0.01). Conclusion: Prolonged SB (e.g., screen viewing, smartphone use, and computer playing) and higher BMI may link to shorter sleep duration and lower sleep efficiency in Chinese young adults. Future randomized controlled trials are needed to further confirm these findings. Given that increased BMI status and SB may relate to adverse health outcomes, more population-based intervention strategies seeking to lower BMI and reduce SB (e.g., nutrition education and physical activity promotion) are needed in this population.

Highlights

The prevalence of sedentary behavior (SB) has reached epidemic levels, and is a major public health problem [1,2,3,4]
To fill the research gap regarding the examination of the relationships among SB, sleep quality, and weight status in young adults in China, the purpose of this study was to examine the relationship among accelerometer-measured SB, sleep quality, and weight status
Future studies are encouraged to use lower epoch lengths, (e.g., 1 s) [53] to process the data more accurately. In this cross-sectional study, we found that both SB and body mass index (BMI) were negatively associated with sleep quality

Summary

Introduction

The prevalence of sedentary behavior (SB) has reached epidemic levels, and is a major public health problem [1,2,3,4]. Regardless of one’s physical activity (PA) levels, SB has been observed to be an independent risk factor for the development of chronic morbidities, such as overweightness/obesity, cardiovascular diseases, type 2 diabetes, and premature mortality [1,6,7,8,9,10]. Of all-cause mortality, and observed strong associations between SB and obesity, cardiovascular disease, and type 2 diabetes [11,12]. Poor sleep quality has been associated with a number of negative health consequences, such as obesity, depression, cardiovascular disease, and all-cause mortality [13]. The prevalence of poor sleep quality remains high, as 40% of young adults have reported

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Discussion

Conclusion