Maintaining Physical Activity in Ethnic Minority Women

不运动直接导致包括乳腺癌和结肠癌在内的健康疾病，并间接导致许多其他癌症，部分原因是导致肥胖。少数民族缺乏运动和肥胖的比例更高。以个人为中心的身体活动（PA）干预最初是有效的。高达50%的人在6个月内退出，此后维护量继续下降。生态模型假定环境不支持PA，阻碍PA的维持。很少有调查测试支持性环境与个别重点干预增加PA的综合效果。本研究的目的是：(1)确定与延迟控制（CONT）相比，24周的社会凝聚力干预（SOCO）是否更有效地将步行作为休闲运动和交通工具，(2)确定居住在高支持PA区（HIGH）的参与者是否比居住在低支持PA区（low）的参与者更有效地维持步行。(3)确定这种效应在两个城市的两个文化群体之间是否具有跨文化可复制性。休斯顿的非裔美国妇女和奥斯汀的西班牙裔妇女将从教堂和社区中心招募，随机分配到SOCO或CONT，参与者的社区将被分为高支持或低支持。参与者将完成书面社会人口统计、步行（国际体育活动问卷）、基线（T1）、干预后（T2）和6个月随访（T3）的健康测量。参加者将完成加速计评估作为有效性检查。假设：(1)SOCO的参与者在T2时比CONT时报告更多的步行时间，(2)居住在高街区的SOCO参与者在T3时报告的步行时间比低街区的参与者多，(3)这种效应将是跨文化可复制的。如果得到支持，假设将表明社会责任组织战略的持续效果受到环境支持的调节。

inactivity contributes to health maladies including breast and colon cancers directly, and numerous other cancers indirectly, in part by contributing to obesity. Ethnic minorities report higher rates of physical inactivity and obesity. Individually-focused physical activity (PA) interventions are initially effective. Up to 50% drop out within 6 months, and maintenance continues to decline after this time. Ecological models posit that environments do not support PA impede PA maintenance. There have been few investigations testing the combined effects of supportive environments with individually focused interventions that increase PA. The purpose of the proposed study is (1) to determine whether a 24 week social cohesion intervention (SOCO) is more effective for adopting walking for leisure exercise and transport in comparison to a delayed control (CONT), (2) to determine whether walking is more effectively maintained by participants who reside in highly supportive PA areas (HIGH) in comparison to those who reside in low supportive PA areas (LOW), and (3) to determine whether this effect is transculturally replicable across 2 cultural groups from 2 cities. African American women in Houston and Hispanic women in Austin will be recruited from churches and community centers and randomized to either SOCO or CONT. Participants' neighborhoods will be classified as HIGH or LOW supportive. Participants will complete written socio demographic, walking (International Physical Activity Questionnaire), and health measures at baseline (T1), post intervention (T2), and 6 month follow-up (T3). Participants will complete accelerometer assessments as a validity check. It is hypothesized that (1) participants in SOCO will report more walking at T2 than CONT, (2) SOCO participants residing in HIGH neighborhoods will report greater minutes of walking than LOW at T3, and (3) this effect will be transculturally replicable. If supported, hypotheses will suggest that the sustained effect of SOCO strategies is moderated by environmental supports.