Plotnikoff Ronald C, Gebel Klaus, Lubans David Revalds
Priority Research Centre in Physical Activity and Nutrition, University of Newcastle, Newcastle NSW, Australia.
J Phys Act Health. 2014 Nov;11(8):1579-86. doi: 10.1123/jpah.2012-0414. Epub 2014 Apr 11.
According to social-cognitive theory (SCT), self-efficacy affects health behavior both directly and indirectly by influencing how individuals perceive their environment. This study examines whether perceptions of home and school environment mediate the association between self-efficacy and physical activity (PA) and sedentary behavior in adolescent girls.
Baseline data from the Nutrition and Enjoyable Activity for Teen Girls (NEAT) was used for this study. Grade 8 female students (n = 357) were recruited from 12 secondary schools located in low-income communities in the Hunter Region, New South Wales, Australia. PA was assessed using accelerometers, and sedentary behavior by self-report and accelerometers. Self-reported measures were used for perceived home and school environment and self-efficacy. Multilevel regression models were calculated to determine if the perceived environment mediated the relationship between self-efficacy with both PA and sedentary behavior.
The perceptions of the school and home environment did not mediate the relationship between PA self-efficacy and PA behavior or sedentary behavior.
The mediated models were not supported for PA or sedentary behavior. However, other results of this paper may be helpful for future theory development and practice. More research is needed to understand behaviors in unique populations such as this.
根据社会认知理论（SCT），自我效能通过影响个体对环境的认知，直接或间接地影响健康行为。本研究旨在探讨家庭和学校环境认知是否介导了青少年女性自我效能与身体活动（PA）及久坐行为之间的关联。
本研究使用了“青少年女孩营养与愉快活动”（NEAT）的基线数据。从澳大利亚新南威尔士州猎人地区低收入社区的12所中学招募了八年级女学生（n = 357）。使用加速度计评估PA，并通过自我报告和加速度计评估久坐行为。使用自我报告的测量方法来评估家庭和学校环境感知以及自我效能。计算多级回归模型，以确定感知环境是否介导了自我效能与PA和久坐行为之间的关系。
学校和家庭环境感知并未介导PA自我效能与PA行为或久坐行为之间的关系。
PA或久坐行为的中介模型未得到支持。然而，本文的其他结果可能有助于未来的理论发展和实践。需要更多的研究来了解此类独特人群的行为。
