AFEECTIVE INFLUENCES ON EXERCISE

这个子项目是许多研究子项目中的一个 由NIH/NCRR资助的中心赠款提供的资源。子项目和 研究者（PI）可能从另一个NIH来源获得主要资金， 因此可以在其他CRISP条目中表示。所列机构为 中心，不一定是研究者的机构。 在我们最近完成的干预研究开始于1999年，我们一直在研究的机制，跟踪青少年女性的身体活动行为的一个完整的学年在一个控制的运动干预。 这种干预在几个方面是独特的：1）它针对久坐不动的，不健康的青少年女性; 2）它不仅跟踪随着时间的推移行为和健康，而且还可能跟踪行为变化的心理社会中介（例如，自我效能、社会支持、活动障碍等）;（3）在一项以生理学为终点的综合研究中，它将社会心理学和生理学假设结合起来。 结果表明，在提高久坐的青少年女性的身体健康和身体活动水平方面，干预是成功的;然而，所评估的拟议心理社会调解人都无法解释行为变化，以及干预对参与者健康的影响（即，VO 2 max，体脂百分比）最小。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. In our recently completed intervention study commencing in 1999, we have been examining the mechanisms of physical activity behavior by tracking adolescent females for a full school year in a controlled exercise intervention. This intervention was unique in several ways: 1) it targeted sedentary, unfit adolescent females; 2) it tracked not only behavior and fitness over time but also likely psychosocial mediators of behavior change (e.g., self-efficacy, social support, perceived barriers to activity, etc?); and 3) it incorporated both psychosocial and physiological hypotheses in an integrated study with a physiological endpoint. Results demonstrate that the intervention was successful in terms of enhancing physical fitness and physical activity levels among sedentary adolescent females; yet, none of the proposed psychosocial mediators assessed were able to explain the behavior change, and the impact of the intervention on participants' fitness (i.e., VO2max, percent body fat) was minimal.