Clinical Child Psychology Program, University of Kansas.
Schiefelbusch Institute for Life Span Studies, Lawrence, KS.
Clin J Pain. 2019 Jul;35(7):618-624. doi: 10.1097/AJP.0000000000000716.
The present study aimed to: (1) better understand physical activity levels in youth with chronic abdominal pain and (2) investigate the relationship between day-level physical activity related to next day pain intensity to identify any intraindividual heterogeneity.
Seventy-one youth (M=13.34 y, SD=2.67 y) with chronic abdominal pain provided reports of pain severity and continuous objective reports of sedentary behavior, moderate-to-vigorous physical activity (MVPA), and total sleep time using accelerometers over 14 days.
Findings revealed that youth with chronic abdominal pain do not meet recommended levels of MVPA per day (M=34.64 min, SD=33.31 min). Further, results indicated a random effect of the previous day's MVPA predicting pain severity. There was a small significant negative effect of within-person total sleep time as a predictor of pain severity.
The current study highlights the importance of separating between-person and within-person differences when examining the relationship between physical activity and pain severity. Future studies should explore moderating factors that may help to explain random effects to better understand the types of individuals with positive or negative relationships between physical activity and pain severity.
本研究旨在：（1）更好地了解慢性腹痛青少年的身体活动水平；（2）调查与次日疼痛强度相关的日常身体活动与疼痛之间的关系，以确定任何个体内的异质性。
71 名患有慢性腹痛的青少年（M=13.34 岁，SD=2.67 岁）使用加速度计在 14 天内报告疼痛严重程度和久坐行为、中等到剧烈体力活动（MVPA）和总睡眠时间的连续客观报告。
研究结果表明，患有慢性腹痛的青少年每天没有达到推荐的 MVPA 水平（M=34.64 分钟，SD=33.31 分钟）。此外，结果表明，前一天的 MVPA 对疼痛严重程度具有随机效应。个体内总睡眠时间对疼痛严重程度的预测有一个小的显著负效应。
本研究强调了在检查身体活动与疼痛严重程度之间的关系时，区分个体间和个体内差异的重要性。未来的研究应该探索调节因素，以帮助解释随机效应，从而更好地了解在身体活动与疼痛严重程度之间存在正相关或负相关的个体类型。
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