Objectives: To characterize and quantify differences in accelerometer-measured physical activity and sedentary time between children with concussion (within the first month of injury) and 1:1 matched healthy controls. Methods: Secondary analysis of accelerometer data collected on 60 children with concussion and 60 healthy controls matched for age, sex, and season of accelerometer wear. Daily and hourly sedentary time, light physical activity (LPA), moderate physical activity (MPA), and vigorous physical activity (VPA) were compared between groups per independent samples t-tests. Results: Children with concussion (12.74 ± 2.85 years, 31 females) were significantly more sedentary than controls (12.43 ± 2.71 years, 31 females; mean difference [MD], 38.3 minutes/day, p=0.006), and spent less time performing LPA (MD, -19.5 minutes/day, p=0.008), MPA (MD, -9.8 minutes/day, p<0.001), and VPA(MD, -12.0 minutes/day, p<0.001); hour-by-hour analyses showed that these differences were observed from 8:00AM to 9:00PM. Sex-specific analyses identified that girls with concussion were less active and more sedentary than both boys with concussion (MD, 50.8 minutes/day; p=0.010) and healthy girls (MD, 51.1 minutes/day; p<0.010). Days post-injury significantly predicted MPA (β=0.071, p=0.032) and VPA (β=0.095, p=0.004), but not LPA or sedentariness in children with concussion. Conclusion: Clinical management should continue to advise against prolonged rest following pediatric concussion, given the activity debt observed within the first-month of injury. Currently, clinical management of concussion is shifting towards prescribing a single bout of daily sub-maximal aerobic exercise. Interventions aimed at reducing overall sedentary time and increasing habitual physical activity in pediatric concussion also warrant study.

中文翻译：

---

加速度计测量的儿科脑震荡习惯性身体活动和久坐时间：一项对照队列研究。

目标：表征和量化加速度计测量的体力活动和脑震荡儿童（在受伤的第一个月内）与 1:1 匹配的健康对照之间的久坐时间的差异。方法：对 60 名脑震荡儿童和 60 名健康对照收集的加速度计数据进行二次分析，这些数据与加速度计佩戴的年龄、性别和季节相匹配。每天和每小时的久坐时间、轻度体力活动 (LPA)、中度体力活动 (MPA) 和剧烈体力活动 (VPA) 在每个独立样本 t 检验的组之间进行比较。结LPA（MD，-19.5 分钟/天，p=0.008），MPA（MD，-9.8 分钟/天，p<0.001）和 VPA（MD，-12.0 分钟/天，p<0.001）；逐小时分析表明，这些差异是在上午 8:00 到晚上 9:00 之间观察到的。性别特异性分析表明，与患有脑震荡的男孩（MD，50.8 分钟/天；p=0.010）和健康女孩（MD，51.1 分钟/天；p<0.010）相比，患有脑震荡的女孩更不活跃，更久坐不动。受伤后天数显着预测 MPA（β=0.071，p=0.032）和 VPA（β=0.095，p=0.004），但不能预测脑震荡儿童的 LPA 或久坐不动。结论：鉴于在受伤的第一个月内观察到的活动债务，临床管理人员应继续建议不要在小儿脑震荡后长时间休息。目前，脑震荡的临床管理正在转向开出单次每日次最大有氧运动的处方。