This study examined the relationships among cognitive acceptance, behavioral commitment, psychological need satisfaction, autonomous extrinsic motivation (EM) for physical activity (PA), and PA behavior. Participants (N = 456, M _age = 40.7 years) completed online measures of these variables, and data were analyzed using structural equation modeling. Results indicated a direct pathway from behavioral commitment to autonomous EM, plus indirect effects via autonomy, competence, and relatedness. There was no direct pathway from cognitive acceptance to autonomous EM, but there were indirect effects via competence and autonomy satisfaction. There was a direct pathway from cognitive acceptance to self-reported PA plus indirect effects via autonomous EM. There was no direct pathway from behavioral commitment to self-reported PA, but there were indirect effects via autonomous EM. Cognitive acceptance and behavioral commitment potentially support the development of autonomous EM for PA. Future research using longitudinal and intervention-based research designs is required to determine the causal relationships among these variables.

本研究探讨了认知接受、行为承诺、心理需求满足、体力活动（PA）的自主外在动机（EM）和 PA 行为之间的关系。参与者（N  = 456，M _年龄 = 40.7 岁）完成了这些变量的在线测量，并使用结构方程模型对数据进行了分析。结果表明，从行为承诺到自主 EM 存在直接途径，加上通过自主性、能力和相关性产生的间接影响。从认知接受到自主 EM 没有直接途径，但通过能力和自主满意度产生间接影响。从认知接受到自我报告的 PA 存在直接途径，再加上自主 EM 的间接影响。从行为承诺到自我报告的 PA 没有直接途径，但通过自主 EM 产生了间接影响。认知接受和行为承诺可能支持 PA 自主 EM 的开发。未来的研究需要使用纵向和基于干预的研究设计来确定这些变量之间的因果关系。