This paper examines the within-day, bidirectional associations between physical activity and self-reported pain among older adults. Older adults (N = 104; range: 60–98 years) participated in a 10-day Ecological Momentary Assessment (EMA) study. Participants received six EMA prompts/day with a single item assessing pain. Participants wore an activPAL monitor measuring step counts. At the within-person level, on occasions when participants took more steps than usual in the 30 min before the EMA prompt, they were more likely to experience pain at the prompt (${\widehat{\mathrm{\beta }}}_{02}=0.0003$, p < .03). At the between-person level, greater step counts in the 30 min before the EMA prompt, on average, were associated with less pain on occasions when pain was experienced (${\widehat{\mathrm{\beta }}}_{01}=-0.0005$, p < .04). Pain was not related to subsequent stepping. Bidirectional associations between physical activity and pain were not documented, but physical activity did appear to be related to subsequent pain.

本文研究了老年人身体活动与自我报告疼痛之间的日内双向关联。老年人（N  = 104；范围：60-98 岁）参加了为期 10 天的生态瞬时评估 (EMA) 研究。参与者每天收到六个 EMA 提示，其中包含一个评估疼痛的项目。参与者佩戴 activPAL 监视器测量步数。在个人层面上，有时当参与者在 EMA 提示前 30 分钟内比平时多走几步时，他们更有可能在提示时感到疼痛（${\widehat{\mathrm{\beta }}}_{02}=0.0003$, p  < .03)。在人与人之间的水平上，在出现 EMA 提示之前的 30 分钟内，更多的步数平均与较少的疼痛相关（在经历疼痛的情况下）${\widehat{\mathrm{\beta }}}_{01}=-0.0005$, p  < .04)。疼痛与随后的踩踏无关。身体活动和疼痛之间的双向关联没有被记录，但身体活动似乎确实与随后的疼痛有关。