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Normal weight obesity and physical fitness in Chinese university students: an overlooked association.

ABSTRACT: The primary aim of this study was to examine the associations of normal weight obesity (NWO) with physical fitness in Chinese university students. As a secondary aim, we assessed whether possible differences in physical fitness between students classified as NWO and normal weight non-obese (NWNO) were mediated by skeletal muscles mass. A total of 383 students (205 males and 178 females, aged 18-24?years) from two universities volunteered to participate in this study. Body height and weight were measured by standard procedures and body composition was assessed by bio-impedance analysis (InBody 720). NWO was defined by a BMI of 18.5-23.9?kg/m2 and a body fat percentage of >?20% or?>?30% in male and female students, respectively. Physical fitness was measured using a 10-min intermittent endurance running test (Andersen test), countermovement jumps (CMJ) and a 5?×?5 m shuttle run test (5mSR). The level of leisure time physical activity (PA) was assessed by a questionnaire. 13.7% of male and 27.5% of female students were classified as NWO. Compared to NWNO, students classified as NWO showed a significantly poorer performance in the Andersen test (males: 1146?±?70?m vs. 1046?±?95?m, females: 968?±?61?m vs. 907?±?67?m, p?

SUBMITTER: Zhang M

PROVIDER: S-EPMC6278052 | biostudies-other | 2018 Dec

REPOSITORIES: biostudies-other

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Normal weight obesity and physical fitness in Chinese university students: an overlooked association.

Zhang Meizhen M Schumann Moritz M Huang Tao T Törmäkangas Timo T Cheng Sulin S

BMC public health 20181204 1

<h4>Background</h4>The primary aim of this study was to examine the associations of normal weight obesity (NWO) with physical fitness in Chinese university students. As a secondary aim, we assessed whether possible differences in physical fitness between students classified as NWO and normal weight non-obese (NWNO) were mediated by skeletal muscles mass.<h4>Methods</h4>A total of 383 students (205 males and 178 females, aged 18-24 years) from two universities volunteered to participate in this s ...[more]

PMID: 30509225

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Project description:BACKGROUND:Existing studies reporting on the levels of physical fitness among college students used relatively few fitness tests as a reflection of physical fitness, which could not comprehensively evaluate the levels of physical fitness. Thus, the current study aimed to investigate the cross-sectional relationship between body mass index (BMI) and a physical fitness index (PFI) based on six indicators of fitness in Chinese college students. METHOD:Anthropometric measurements and six measures of physical fitness (Vital capacity, 50-m sprint, sit and reach, standing long jump, 800/1000-m run, pull-up/bent-leg sit-up) were measured. BMI was calculated to classify individuals into underweight, normal weight, overweight, and obesity groups. Z-scores based on sex-specific mean and standard deviation were calculated, and the sum of z-scores for the six fitness tests was used as a PFI. Three models (a linear regression model, polynomial regression model with a second-order BMI term and a restricted cubic spline regression model) were fitted to discuss the potential relation between BMI and PFI. We compared the models using Akaike Information Criterion (AIC) and R square. RESULTS:Totally, 8548 freshmen from the years 2014 to 2016 in a medical college completed the physical fitness tests. There was a decreasing trend of physical fitness index from the years 2014 to 2016 (P for trend <?0.01). More male than female students were overweight or obese (23.5% vs. 11.9%), but more female than male students were normal weight (74.7% vs. 64.8%). A restricted cubic spline regression model was superior to linear and polynomial regression model with lower AIC and higher R square. CONCLUSIONS:The relationships between BMI and PFI in college students were non-linear. Underweight, overweight and obese students had poorer performance in physical fitness index than normal weight students. Future prospective, longitudinal cohort studies to identify the causal relations and potential mechanism in a good manner are required.

Dataset Information

Normal weight obesity and physical fitness in Chinese university students: an overlooked association.

Publications

Normal weight obesity and physical fitness in Chinese university students: an overlooked association.

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