The aim of the current study was to test the long-term predictive validity of the trans-contextual model in accounting for variance in adolescents’ out-of-school physical activity measured by self-report and accelerometer based-devices over a one-year period. Secondary school students (N = 265) aged 11 to 15 years completed a three-wave survey on two occasions in time, spanning a one-year interval, measuring perceived autonomy support in physical education (PE), peer and parent autonomy support in leisure-time, autonomous and controlled motivation in PE and leisure-time, attitude, subjective norms, perceived behavioural control, intention, and out-of-school physical activity both by self-report and accelerometer-based devices. A variance-based structural equation model using residualized change scores revealed that perceived autonomy support from PE teachers predicted autonomous motivation in PE, and autonomous motivation in PE predicted autonomous motivation in leisure-time. In addition, peer and parent autonomy support predicted autonomous motivation in leisure-time. Autonomous motivation in leisure-time indirectly predicted physical activity intention mediated by attitude and perceived behavioural control. Intention predicted self-reported physical activity participation, although the effect was in the opposite direction to our prediction, but not physical activity measured by accelerometer-based devices. Results support some tenets of the trans-contextual model over a one-year time period, particularly the determinants of physical activity intentions. The introduction of COVID-19 restrictions may explain the negative relationship between intention and self-reported physical activity. Further longitudinal studies are needed to verify the results of the current study.

本研究的目的是测试跨语境模型在解释一年内通过自我报告和基于加速度计的设备测量的青少年校外体育活动差异方面的长期预测有效性。时期。中学生 ( N= 265) 年龄在 11 至 15 岁的 11 至 15 岁的人在时间跨度为一年的两次时间里完成了一次三波调查，测量了体育教育 (PE) 中的感知自主支持、闲暇时间的同伴和家长自主支持、自主和通过自我报告和基于加速度计的设备控制体育和休闲时间的动机、态度、主观规范、感知行为控制、意图和校外体育活动。使用残差变化分数的基于方差的结构方程模型表明，体育教师的感知自主支持预测了体育中的自主动机，而体育中的自主动机预测了闲暇时间的自主动机。此外，同伴和父母的自主支持预测了闲暇时间的自主动机。闲暇时间的自主动机间接预测了由态度和感知行为控制介导的身体活动意图。意图预测了自我报告的身体活动参与，虽然效果与我们的预测相反，但不是基于加速度计的设备测量的身体活动。结果支持跨语境模型在一年时间段内的一些原则，特别是身体活动意图的决定因素。COVID-19 限制的引入可以解释意图和自我报告的身体活动之间的负相关关系。需要进一步的纵向研究来验证当前研究的结果。意图预测了自我报告的身体活动参与，虽然效果与我们的预测相反，但不是基于加速度计的设备测量的身体活动。结果支持跨语境模型在一年时间段内的一些原则，特别是身体活动意图的决定因素。COVID-19 限制的引入可以解释意图和自我报告的身体活动之间的负相关关系。需要进一步的纵向研究来验证当前研究的结果。意图预测了自我报告的身体活动参与，虽然效果与我们的预测相反，但不是基于加速度计的设备测量的身体活动。结果支持跨语境模型在一年时间段内的一些原则，特别是身体活动意图的决定因素。COVID-19 限制的引入可以解释意图和自我报告的身体活动之间的负相关关系。需要进一步的纵向研究来验证当前研究的结果。COVID-19 限制的引入可以解释意图和自我报告的身体活动之间的负相关关系。需要进一步的纵向研究来验证当前研究的结果。COVID-19 限制的引入可以解释意图和自我报告的身体活动之间的负相关关系。需要进一步的纵向研究来验证当前研究的结果。