Slater Sandy, Chriqui Jamie, Chaloupka Frank J, Johnston Lloyd
University of Illinois at Chicago, Institute for Health Research and Policy and Department of Health Policy & Administration, School of Public Health, 1747W. Roosevelt Road, M/C 275, Room 558, Chicago, IL 60608, USA.
University of Illinois at Chicago, Institute for Health Research and Policy, 1747W. Roosevelt Road, M/C 275, Room 558, Chicago, IL 60608, USA.
Prev Med. 2014 Dec;69 Suppl 1:S37-43. doi: 10.1016/j.ypmed.2014.08.032. Epub 2014 Sep 6.
Joint use policies (JUP) encourage shared facility use, usually between schools and a city or private organization, for both physical activity-related and non-physical activity-related programs. Little is known about JUP's impact on physical activity (PA). This study examined whether more specific JUPs were associated with increased PA and decreased sedentary behavior (SB) in adolescents.
Data on PA, sports participation, and SB were taken from annual cross-sectional nationally representative samples of 51,269 8th, 10th and 12th grade public school students nested in 461 school districts in the US from 2009-2011. JUP measures were constructed using information obtained from corresponding school district JU policies. Multivariable analyses were conducted, controlling for individual demographic and socioeconomic characteristics and clustering at the district level.
Results showed small associations between more specific JUPs and increased PA (IRR 1.01, 95% CI: 1.00, 1.02). Closer examination of specific JUP provisions indicates that specifying what times facilities are available for use was associated with vigorous exercise and prioritizing school or affiliated organizations' use and which spaces were available for use were associated with vigorous exercise and more frequent PA participation, which includes participation in sports or athletics. No associations were found between more specific JUPs and SB.
JUPS may have small influences on adolescent physical activity behavior. Future longitudinal studies should be conducted to examine the impact of JUPs in conjunction with other physical activity-related policies and environmental changes to determine what impact they have on overall adolescent physical activity and sedentary behavior.
联合使用政策（JUP）鼓励共享设施的使用，通常是学校与城市或私人组织之间，用于与体育活动相关和与非体育活动相关的项目。关于JUP对体育活动（PA）的影响知之甚少。本研究调查了更具体的JUP是否与青少年体育活动增加和久坐行为（SB）减少相关。
体育活动、体育参与和久坐行为的数据来自2009 - 2011年美国461个学区的51269名8年级、10年级和12年级公立学校学生的年度横断面全国代表性样本。JUP测量指标是使用从相应学区的JU政策中获得的信息构建的。进行了多变量分析，控制了个体人口统计学和社会经济特征，并在学区层面进行聚类分析。
结果显示更具体的JUP与体育活动增加之间存在小的关联（发病率比IRR为1.01，95%置信区间：1.00，1.02）。对特定JUP条款的进一步检查表明，规定设施可使用的时间与剧烈运动相关，优先考虑学校或附属组织的使用以及哪些空间可供使用与剧烈运动和更频繁的体育活动参与相关，体育活动参与包括参加体育运动。未发现更具体的JUP与久坐行为之间存在关联。
JUP可能对青少年体育活动行为有小的影响。未来应进行纵向研究，以检查JUP与其他与体育活动相关的政策和环境变化相结合的影响，以确定它们对青少年总体体育活动和久坐行为有何影响。
