ObjectivesTo determine if adolescents with patellofemoral pain exhibit different biomechanical characteristics to asymptomatic adolescents during walking and running.MethodsTwenty‐eight adolescents with patellofemoral pain (16 male, 12 female, mean [SD] age: 14.3 [1.7] years) and 24 asymptomatic adolescents (13 male, 11 female, mean [SD] age: 14.1 [1.6] years) participated. Participants walked and ran on an instrumented treadmill in a standardized athletic shoe. Continuous hip, knee, and ankle joint angles and moments, and frontal plane pelvic motion were compared between groups using one‐dimensional statistical parametric mapping independent t‐tests (alpha <0.05). Cadence and stride length were compared between groups using independent t‐tests.ResultsDuring walking, adolescents with patellofemoral pain had a higher hip extension moment at 7%–8% of the gait cycle (p = 0.04) and walked with a shorter stride length (mean difference [95% confidence interval] = −0.07 [−0.1, −0.01] m). There were no other differences between groups during walking. During running, adolescents with patellofemoral pain had greater knee flexion than asymptomatic adolescents at 35%–40% of the gait cycle (p = 0.04) and ran with a higher cadence (mean difference [95% confidence interval] = 5.8 [2.0, 9.5] steps/min). There were no other statistically significant differences between groups during running.ConclusionsAdolescents with patellofemoral pain demonstrate few biomechanical differences to asymptomatic adolescents during walking and running. The identified differences are likely of limited clinical importance. Biomechanical alterations which have been previously associated with patellofemoral pain in adults, may not need to be the target of management of adolescent patellofemoral pain.

中文翻译：

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有或没有髌股疼痛的青少年的步态生物力学没有差异

目的 确定患有髌股疼痛的青少年在行走和跑步时是否表现出与无症状青少年不同的生物力学特征。方法 28 名患有髌股疼痛的青少年（16 名男性，12 名女性，平均 [SD] 年龄：14.3 [1.7] 岁）和 24 名无症状青少年（ 13 名男性，11 名女性，平均 [SD] 年龄：14.1 [1.6] 岁）参加。参与者穿着标准化运动鞋在仪器跑步机上行走和跑步。使用一维统计参数映射独立比较组间的连续髋关节、膝关节和踝关节角度和力矩，以及骨盆额面运动t‐测试（alpha <0.05）。使用独立的方法比较组间的步频和步幅t‐测试。结果在步行过程中，患有髌股疼痛的青少年在步态周期的 7%–8% 处具有较高的髋部伸展力矩（p= 0.04）并以较短的步幅行走（平均差 [95% 置信区间] = −0.07 [−0.1, −0.01] 米）。在步行过程中，各组之间没有其他差异。在跑步过程中，有髌股疼痛的青少年在步态周期的 35%–40% 时比无症状青少年有更大的膝关节屈曲（p= 0.04）并以更高的步频跑步（平均差 [95% 置信区间] = 5.8 [2.0, 9.5] 步/分钟）。跑步期间，各组之间没有其他统计学上的显着差异。结论：患有髌股疼痛的青少年在步行和跑步期间与无症状青少年几乎没有生物力学差异。所确定的差异可能具有有限的临床重要性。以前与成人髌股疼痛相关的生物力学改变可能不需要成为青少年髌股疼痛的治疗目标。