Heeding recent calls to capture dynamic variability of physical activity (PA) motivation within a self-determination theory framework, this study examined the extent to which psychological needs satisfaction in PA predicted subsequent PA, disaggregating within-person and between-persons data. University students (N = 89) wore an ActiGraph GT3X accelerometer for 6 days and reported basic psychological needs satisfaction daily. Multilevel models examined whether competence, autonomy, and relatedness for the previous day’s PA (>2,020 counts per minute) predicted the following day’s minutes of PA (>2,020 counts per minute), controlling for previous-day PA. Participants who, on average, reported greater feelings of autonomy and competence tended to engage in more minutes of PA the following day. When participants reported feeling greater relatedness than what was typical for them, they tended to engage in more PA the following day. Psychological needs vary day to day, but how and to what extent they predict PA depends on the specific need.

注意到最近在自我决定理论框架内捕获身体活动 (PA) 动机的动态变化的呼吁，本研究检查了 PA 中心理需求满足程度预测后续 PA 的程度，分解了个人内部和个人之间的数据。大学生（N = 89) 佩戴 ActiGraph GT3X 加速度计 6 天，每天报告基本心理需求满足情况。多级模型检查前一天的 PA（>2,020 计数/分钟）的能力、自主性和相关性是否预测了第二天的 PA（>2,020 计数/分钟），控制前一天的 PA。平均而言，报告了更强的自主感和能力的参与者倾向于在第二天进行更多的 PA。当参与者报告说感觉比他们通常的感觉更强时，他们往往会在第二天进行更多的 PA。心理需求每天都在变化，但他们预测 PA 的方式和程度取决于具体需求。