AFEECTIVE INFLUENCES ON EXERCISE

这个子项目是许多研究子项目中利用 资源由NIH/NCRR资助的中心拨款提供。子项目和 调查员(PI)可能从NIH的另一个来源获得了主要资金， 并因此可以在其他清晰的条目中表示。列出的机构是 该中心不一定是调查人员的机构。 在我们最近于1999年开始的干预研究中，我们一直在通过在受控运动干预中跟踪青春期女性整整一学年来检查身体活动行为的机制。这种干预在几个方面是独一无二的：1)它针对久坐不动的青春期女性；2)它不仅跟踪随着时间的推移的行为和健康状况，而且还跟踪行为变化的可能的心理社会中介因素(例如，自我效能、社会支持、活动的感知障碍等？)；3)它将心理社会假说和生理假说纳入一个具有生理终点的综合研究中。结果表明，在提高久坐不动的青春期女性的身体健康和体力活动水平方面，干预是成功的；然而，被评估的心理社会调节因子都不能解释行为变化，干预对参与者健康(即最大摄氧量，体脂百分比)的影响微乎其微。

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.