BACKGROUND Children and adolescents with cerebral palsy who are classified as Gross Motor Function Classification Scale level I or II are usually able to run but lack ankle power generation for push-off. The aim of this study was to analyze the efficacy of a running training program in improving ankle power generation in children and adolescents with cerebral palsy. METHODS This randomized controlled trial compared kinematic and spatiotemporal data collected during running from 38 children and adolescents with unilateral or bilateral cerebral palsy before and after a 12-week running program. Normalized speed, stride length, cadence, foot strike pattern, peak ankle power generation, peak hip flexor power generation in swing and propulsion strategy were calculated. Linear mixed models were developed to analyze differences between groups. FINDINGS At follow-up the intervention group had increased normalized speed of running (t = -3.68 p < .01) while the control group got slower (t = 3.17 p < .01). In running, children in Gross Motor Function Classification Scale level II in the intervention group increased ankle power (t = 2.49 p = .01) while the control group did not change (t = 0.38 p = .71). In sprinting, children in Gross Motor Function Classification Scale levels I and II in the intervention group maintained ankle power (level I t = 0.32 p = .75; level II t = 1.56 p = .12) while those in the control group decreased ankle power (level I t = 4.69 p < .01; level II t = 2.52 p = .01). Most within-group differences did not result in significant between-group differences at follow-up. INTERPRETATION Power generation for running may be responsive to targeted intervention in children with cerebral palsy.

中文翻译：

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跑步训练干预对脑瘫儿童和青少年脚踝发电的影响：一项随机对照试验。

背景技术被分类为I级或II级大运动功能分类量表的脑瘫儿童和青少年通常能够奔跑，但是缺乏用于下垂的踝关节动力产生。这项研究的目的是分析跑步训练计划在改善脑瘫儿童和青少年脚踝发电方面的功效。方法该随机对照试验比较了在运行12周程序之前和之后从38名患有单侧或双侧脑瘫的儿童和青少年跑步过程中收集的运动学和时空数据。计算归一化的速度，步幅，步频，脚踏方式，峰值踝关节发电，挥杆时峰值髋屈肌发电和推进策略。开发了线性混合模型以分析组之间的差异。结果在随访中，干预组的正常跑步速度增加了（t = -3.68 p <.01），而对照组则变慢了（t = 3.17 p <.01）。在跑步中，干预组中处于“大运动功能分类量表” II级的儿童踝关节力量增加（t = 2.49 p = .01），而对照组则没有变化（t = 0.38 p = .71）。在短跑中，干预组中大运动功能分级量表I和II的儿童保持踝关节力量（I t = 0.32 p = .75； II t = 1.56 p = .12），而对照组的儿童踝关节下降功率（I t级别= 4.69 p <0.01; II级别t = 2.52 p = 0.01）随访时，大多数组内差异均未导致组间差异显着。