title: Physical activity patterns and its influencing factors among high school students of Izeh city: Application of some constructs of health belief model.
abstract: OBJECTIVE
  This study has been conducted to identify the roles of self-efficacy, benefits of and barriers to physical activity, and its relationship with physical activity in male and female high school students in the city of Izeh, Iran.
  
  
  METHODS
  In this cross-sectional descriptive analytical study, 500 students (200 boys and 300 girls) from high schools of Izeh city during the period 2011-2012 were chosen using the multistage random sampling method. The data for this study was acquired through a multisectional questionnaire that included sections as follows: Demographic characteristics, self-efficacy, and perceived benefits and barriers. The gathered data was then studied and analyzed. Statistical tests such as independent t-tests, Spearman's correlation, Pearson's correlation coefficient and linear regression were used to interpret and analyze the data.
  
  
  RESULTS
  Data analysis showed that the mean age of male participants was 15.67 ± 0.95 years and females 15.86 ± 1.16 years. The average weekly time of physical activity in male students was 424.74 ± 158.48 min and in females 186.63 ± 90.59 min. The mean scores for self-efficacy and perceived benefits of physical activity were significantly higher in boys as compared to girls. There was a positive and significant correlation between the mean scores for perceived self-efficacy and the weekly time in male students spent on physical activity as well as the mean scores for perceived benefits and the weekly time spent on physical activity in both genders.
  
  
  CONCLUSIONS
  The results of this study showed that many factors influence students' physical activity; however, the role of these factors is not identical in the two genders. An understanding of these factors helps educationalists and other health experts design appropriate interventions.
authors.affiliation: Departments of Health Education and Promotion, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Arash
authors.initials: A
authors.lastname: Salahshuri
authors.affiliation: Departments of Health Education and Promotion, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Gholamreza
authors.initials: G
authors.lastname: Sharifirad
authors.affiliation: Departments of Biostatistics and Epidemiology, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Akbar
authors.initials: A
authors.lastname: Hassanzadeh
authors.affiliation: Departments of Health Education and Promotion, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Firoozeh
authors.initials: F
authors.lastname: Mostafavi
keywords: Perceived barriers; perceived benefits; perceived self-efficacy; physical activity; students
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