Pedometer-determined physical activity patterns in a segmented school day among Hong Kong primary school children

• Main Authors: Yang Gao, Jing-jing Wang, Patrick W.C. Lau, Lynda Ransdell
• Format: Article
• Language: English
• Published: Elsevier 2015-06-01
• Series: Journal of Exercise Science & Fitness
• Subjects: Child; Pedometer; Physical activity patterns; Segmented school day
• Online Access: http://www.sciencedirect.com/science/article/pii/S1728869X15000209

Background/Objective: This study aimed to characterize pedometer-determined physical activity (PA) patterns in segmented school days among Hong Kong primary school children. Methods: Participants were instructed to wear pedometers for 4 consecutive days. The overall step counts and counts at specific periods (e.g., after school, recess, and lunch) during the test days were recorded. Results: Of the 74 recruited participants, 68 (41.2% boys, aged 10 and 11 years old) provided valid data. The mean total daily steps over the 4 test days ranged from 9064 to 9714 (standard deviation = 3140–3471 steps). The periods that contributed most toward total daily steps were after school (34.2%), recess (14.0%), and physical education (PE) classes (12.3%). Overall, Student t tests revealed that boys were more active than girls. More active children (daily step average above the sex-specific median value) accumulated significantly more steps during recess and after school than less active children (daily step average below the sex-specific median value) in both sexes (mean differences ranged from 507 steps to 1977 steps). A mixed model analysis of variance (ANOVA) revealed that students accumulated 914 steps more on days that included PE classes than on days without PE classes. A three-way ANOVA found no significant differences in body weight status (normal weight vs. overweight and obesity) and travel mode (active vs. passive modes). Conclusion: The findings provide a better understanding of PA patterns and the contribution of the distinct segments within a school day to children's PA. This information may assist in developing more effective, appropriate, and timely school-based PA interventions for children in Hong Kong.