Abstract
Background:Pedometer is the most convenient and economical objective tool which is progressively being used to assess physical activity in adolescents. The purpose of this study was to describe the overall and gender stratified physical activity levels and to determine minimal no. of reliable days for collecting pedometer data among Pakistani adolescents. Methods:Descriptive cross-sectional study was conducted in four schools of Karachi during 2017. A total of 265 adolescents (age 13-16 years) wore unsealed Ymax Digi Walker SW-200 pedometer for a duration of 7 days including both weekends and weekdays. Data were analyzed using SPSS version 21. Independent t test and ANOVA were used for gender based stratified physical activity levels whereas, Cronbach’s alpha and Intra class correlation coefficient (ICC) were used to ascertain the reliability of pedometer data. Results:The average recorded step counts per day were 10,010 (SD: ± 4926). However, boys took 12,513 (SD: ± 5365) steps / day than girls 7,809 (SD: ± 3168) and higher steps were recorded from Thursday to Saturday. The reliability of pedometer monitoring increases with increase in number of days. The maximum pedometer reliability ? = 0.91 was observed for 7 days. Conclusion:This study concludes that adolescents are more physical active, with slightly higher reported activity among boys compared to girls. It also proposes that at least 7 days pedometer data should be collected for the reliable estimation of adolescent’s physical activity. The resulting data provides key information regarding pedometer-determined physical activity which may be useful for formulating strategies and other interventions to increase level of adolescents physical activity.
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