| Summary: | 碩士 === 國立臺北護理健康大學 === 運動保健研究所 === 101 === Purpose: Body composition is a critical inference factor of cardiovascular endurance and physical activity. The 24-hour shift pattern of policemen not only affects the cardiovascular endurance but also affects the quality of sleep and physical activity. This study examined the status of body composition, quality of sleep, physical activity and cardiovascular endurance of policemen. Further, it investigated the association of body composition with the rest of the three factors. The results of the study can provide suggestions to police administrative in physical training programs. Methods: A total of 77 policemen from two police branches in Taipei were recruited using convenience sampling. Body composition included body mass index (BMI) and percentage of body fat (PBF) (assessed with Inbody 230). Pittsburgh Sleep Quality Index (PSQI) was applied to assess the quality of sleep. Daily step counts (steps/day) and time spent in moderate/vigorous intensity physical activity were recorded with Lifecorder EX (Suzuken Co., Ltd., Japan). The study used indicator of physical fitness of policemen (time of three-thousand meters run, THMR) to evaluate cardiovascular endurance. Data was collected and analyzed using SPSS software (Version 18). Descriptive statistics, one-way ANOVA test and Mann-Whitney U were used for comparison between groups. Pearson Correlation and Partial Correlation were used to analyze the correlation among factors. Statistical significance was set at p < .05. Results and Discussions: The average BMI and PBF of 77 participants were 26.0±3.8 kg/m2 and 23.9±5.9%, respectively. Both were higher than the standard range. PSQI score was 7.8±3.1 which indicated poor sleep quality. The average steps/day of participants was 7,989±2,870 steps and time spent in moderate/vigorous intensity physical activity was 18.3±12.1 minutes, neither steps/day nor time spent in moderate/vigorous intensity physical activity reached recommendation by American College of Sports Medicine, which are 10,000 step-count and 30 minutes moderate/vigorous intensity physical activity. Mean THMR was 1,008.6±156.5 seconds. It was rated at 66 on the 100 scales which showed that the cardiovascular endurance of policemen needed more improvement. In addition, there was a significant correlation between BMI and PSQI. Furthermore, BMI, PBF and steps/day were all significantly correlated with THMR while carried out partial correlation analysis. Conclusions and Suggestions: Body composition such as BMI and PBF affect the quality of sleep, physical activity and cardiovascular endurance of policemen. The body composition and cardiovascular endurance of policemen were affected by their steps/day. In order to improve cardiovascular endurance, the study suggests that policemen should keep their BMI and PBF under 25 kg/m2 and 22%, respectively, and steps/day should more than 8,650 steps.
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