Effectiveness of Interventional Program based on Trans-Theoretical Model to Promote Regular Physical Activity in Office Workers

Despite importance of physical activity in health، welfare and quality of life، today most people do not have adequate physical activity. The aim of this study was to evaluate the effectiveness of interventional program based on trans-theoretical model to promote regular physical activity in office workers in Ilam University of Medical Sciences. This was a pre and post-interventional study which was conducted on 97 employees in Ilam University of Medical Sciences. First، participants were selected by random sampling and then they completed the trans-theoretical model self-report questionnaire. Participants received educational package including a pamphlet، booklet and physical activity video CD that designed based on trans-theoretical model. After three months to determine the effectiveness of intervention، the trans-theoretical model questionnaire was completed again. The mean age of the participants was 32. 16 ± 6. 7 years. 42% of the study subjects were males and 55% were females. Findings showed that participants were interested in walking (42. 3%)، recreational swimming (52. 6%)، gym sports (3. 1%) and climbing (1. 2 %) as regular physical activities. Comparing the results of physical activity changes showed that the interventional program significantly improved participants'' stage of change (P < 0. 05). In addition، comparing the mean score of decisional balance، process of change and physical activity self-efficacy indicated a significant increase in trans-theoretical construct in post-interventional phase compared with the pre-interventional phase (P < 0. 05). Findings indicate a significant increase in mean score of consciousness raising، dramatic relief، counter condition، stimulus control، supportive relationships، self-liberation after the intervention compared with the post-interventional phase (P < 0. 05). However، increase in mean score of other cognitive and behavioral processes levels was not significant. According to the results، design and implementing of interventional programs based on behavioral change models could improve health-related behaviors.