Ranaei Afsaneh, Tavakoly Sany Seyedeh Belin, Vahedian Shahroodi Mohammad, Sabahi Azam, Tehrani Hadi, Khajavi Abdoljavad
School of Health, Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran.
Department of Health, Safety, Environment, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran.
Front Public Health. 2025 May 7;13:1558210. doi: 10.3389/fpubh.2025.1558210. eCollection 2025.
The level of physical activity (PA) among Iranian adolescent girls is significantly lower than the recommended level. This survey aims to examine the impact of school-based peer education Intervention on promoting PA using the theory of planned behavior (TPB) among girls in high school.
A quasi-experimental study was conducted on 160 girls in high school of Gonabad, Iran. School-based peer education program was conducted for the intervention group through five training sessions and the three-month follow-up to enhance clarity. Data was collected using a researcher-made questionnaire based on TPB, the International Physical Activity Questionnaire (IPAQ), and demographic information. The content validity Index, content validity ratio, and Cronbach's alpha coefficient values demonstrated strong content validity and reliability (> 0.85). The obtained data were analyzed using appropriate statistical tests using SPSS software 20.
The average age of the participants was 13.5 ± 1.2 years, and 65% had low levels of PA. The intervention group demonstrated significant improvements across all constructs of the TPB compared to the control group. The mean scores for attitude toward behavior ( = 0.012), subjective norms ( = 0.023), perceived behavioral control ( = 0.003), and behavioral intention ( = 0.001) showed significant enhancement in the intervention group. Additionally, physical activity behavior improved significantly ( < 0.05) after the intervention, while no significant improvement was observed in the control group ( > 0.05). The Cohen's d values for all constructs in the intervention group, except for subjective norms, exceeded 0.8, indicating a large effect size for these constructs.
School-based peer education using the TPB can be used as an effective theory to promote the level of PA among high school girls. This approach strengthens attitudes, perceived behavioral control, and subjective norms, leading to improved behavioral intentions and increased PA among female students.
伊朗青春期女孩的身体活动（PA）水平显著低于推荐水平。本调查旨在运用计划行为理论（TPB），研究基于学校的同伴教育干预对促进高中女生身体活动的影响。
在伊朗戈纳巴德的一所高中对160名女生进行了一项准实验研究。通过五次培训课程和为期三个月的随访，为干预组开展了基于学校的同伴教育项目，以提高清晰度。使用基于TPB、国际身体活动问卷（IPAQ）和人口统计学信息的研究者自制问卷收集数据。内容效度指数、内容效度比和Cronbach's alpha系数值表明具有很强的内容效度和信度（>0.85）。使用SPSS软件20通过适当的统计检验对获得的数据进行分析。
参与者的平均年龄为13.5±1.2岁，65%的人身体活动水平较低。与对照组相比，干预组在TPB的所有构念上均有显著改善。干预组的行为态度（=0.012）、主观规范（=0.023）、感知行为控制（=0.003）和行为意向（=0.001）的平均得分均有显著提高。此外，干预后身体活动行为有显著改善（<0.05），而对照组未观察到显著改善（>0.05）。干预组中除主观规范外的所有构念的Cohen's d值均超过0.8，表明这些构念的效应量较大。
运用TPB的基于学校的同伴教育可作为提高高中女生身体活动水平的有效理论。这种方法强化了态度、感知行为控制和主观规范，从而改善了行为意向，增加了女学生的身体活动。
