Salinas Jennifer J, McDaniel Marisol, Parra-Medina Deborah
Center of Emphasis in Cancer, Department of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, El Paso, TX, USA.
Latino Research Initiative, College of Liberal Arts, University of Texas at Austin, Austin, TX, USA.
J Prev Med Public Health. 2018 Sep;51(5):234-241. doi: 10.3961/jpmph.18.052. Epub 2018 Jul 25.
To determine the relationships between physical activity (PA), the neighborhood environment support for PA, and social support for PA among Mexican-American women living in South Texas. The Enlace study was a randomized controlled trial that tested the effectiveness of a promotora-led PA intervention among low-income Mexican origin women (n=614) living in colonias.
The dependent measures included accelerometer-measured average moderate to vigorous physical activity (MVPA) and sedentary breaks and the Community Health Activities Model Program for Seniors PA 41-item questionnaire. The independent measures included the Physical Activity and Neighborhood Environment Scale (PANES) and the 13-item Physical Activity Social Support (PASS) scale.
Enlace participants were on average 40.4 (standard deviation, 10.3) years old, born in Mexico (86.1%), and uninsured (83.1%). Adjusted linear regression results indicated that each 1-point increment in the PANES overall score was associated with 0.050 (p<0.001) unit increase in sedentary break and a -0.043 (p=0.001) unit decrease in sedentary break duration. Both PANES (β=0.296; p=0.002) and PASS scores (β=0.076; p<0.001) were associated with weekly average self-reported MVPA. Interaction effects were observed between PASS scores and accelerometer-measured frequency of sedentary breaks and sedentary time duration.
The findings of this study indicate that the relationships between PA and built environment and social support are measure-dependent and suggest that reducing sedentary time in this population may require a closer assessment of social support for PA.
确定居住在得克萨斯州南部的墨西哥裔美国女性的身体活动（PA）、社区环境对PA的支持以及PA的社会支持之间的关系。Enlace研究是一项随机对照试验，测试了由健康促进者主导的PA干预措施对居住在边境定居点的低收入墨西哥裔女性（n = 614）的有效性。
相关测量指标包括通过加速度计测量的平均中度至剧烈身体活动（MVPA）和久坐休息时间，以及老年人PA社区健康活动模型计划的41项问卷。独立测量指标包括身体活动与邻里环境量表（PANES）和13项身体活动社会支持（PASS）量表。
Enlace研究的参与者平均年龄为40.4岁（标准差为10.3），出生于墨西哥（86.1%），且未参保（83.1%）。调整后的线性回归结果表明，PANES总分每增加1分，久坐休息时间增加0.050个单位（p<0.001），久坐休息时长减少0.043个单位（p = 0.001）。PANES得分（β = 0.296；p = 0.002）和PASS得分（β = 0.076；p<0.001）均与每周自我报告的平均MVPA相关。观察到PASS得分与加速度计测量的久坐休息频率和久坐时长之间存在交互作用。
本研究结果表明，PA与建成环境和社会支持之间的关系取决于测量指标，并表明减少该人群的久坐时间可能需要更密切地评估PA的社会支持情况。
