Texas State University, San Marcos.
University of Virginia, Charlottesville.
J Athl Train. 2020 Dec 1;55(12):1247-1254. doi: 10.4085/1062-6050-0514.19.
Exercise-related lower leg pain (ERLLP) is common in runners.
To compare biomechanical (kinematic, kinetic, and spatiotemporal) measures obtained from wearable sensors as well as lower extremity alignment, range of motion, and strength during running between runners with and those without ERLLP.
Case-control study.
Field and laboratory.
Of 32 young adults who had been running regularly (>10 mi [16 km] per week) for ≥3 months, 16 had ERLLP for ≥2 weeks and 16 were healthy control participants.
MAIN OUTCOME MEASURE(S): Both field and laboratory measures were collected at the initial visit. The laboratory measures consisted of alignment (arch height index, foot posture index, navicular drop, tibial torsion, Q-angle, and hip anteversion), range of motion (great toe, ankle, knee, and hip), and strength. Participants then completed a 1.67-mi (2.69-km) run along a predetermined route to calibrate the RunScribe devices. The RunScribe wearable sensors collected kinematic (pronation excursion and maximum pronation velocity), kinetic (impact g and braking g), and spatiotemporal (stride length, step length, contact time, stride pace, and flight ratio) measures. Participants then wore the sensors during at least 3 training runs in the next week.
The ERLLP group had a slower stride pace than the healthy group, which was accounted for as a covariate in subsequent analyses. The ERLLP group had a longer contact time during the stance phase of running (mean difference [MD] = 18.00 ± 8.27 milliseconds) and decreased stride length (MD = -0.11 ± 0.05 m) than the control group. For the clinical measures, the ERLLP group demonstrated increased range of motion for great-toe flexion (MD = 13.9 ± 4.6°) and ankle eversion (MD = 6.3 ± 2.7°) and decreased strength for ankle inversion (MD = -0.49 ± 0.23 N/kg), ankle eversion (MD = -0.57 ± 0.27 N/kg), and hip flexion (MD = -0.99 ± 0.39 N/kg).
The ERLLP group exhibited a longer contact time and decreased stride length during running as well as strength deficits at the ankle and hip. Gait retraining and lower extremity strengthening may be warranted as clinical interventions in runners with ERLLP.
与跑步相关的小腿疼痛（ERLLP）在跑步者中很常见。
比较有和无 ERLLP 的跑步者在跑步时从可穿戴传感器获得的生物力学（运动学、动力学和时空）测量值以及下肢对线、运动范围和力量。
病例对照研究。
现场和实验室。
32 名年轻成年人经常跑步（每周>10 英里[16 公里]）≥3 个月，其中 16 人有 ERLLP≥2 周，16 人是健康对照组参与者。
初次就诊时采集了现场和实验室测量值。实验室测量包括对线（足弓高度指数、足型指数、舟骨下降、胫骨扭转、Q 角和髋关节前倾角）、运动范围（大脚趾、踝关节、膝关节和髋关节）和力量。然后，参与者沿着预定路线完成了 1.67 英里（2.69 公里）的跑步，以校准 RunScribe 设备。可穿戴的 RunScribe 传感器收集了运动学（旋前幅度和最大旋前速度）、动力学（冲击 g 和制动 g）和时空（步长、步长、接触时间、步频和飞行比）测量值。然后，参与者在接下来的一周内至少进行了 3 次训练跑，并佩戴了传感器。
ERLLP 组的步频比健康组慢，这在随后的分析中被视为协变量。与对照组相比，ERLLP 组在跑步的支撑阶段的接触时间更长（平均差异[MD]=18.00±8.27 毫秒），步长更短（MD=-0.11±0.05 米）。对于临床测量，ERLLP 组的大脚趾背屈（MD=13.9±4.6°）和踝关节外翻（MD=6.3±2.7°）的运动范围增加，而踝关节内翻（MD=-0.49±0.23 N/kg）、踝关节外翻（MD=-0.57±0.27 N/kg）和髋关节屈曲（MD=-0.99±0.39 N/kg）的力量下降。
ERLLP 组在跑步时表现出更长的接触时间和更短的步长，以及踝关节和髋关节的力量不足。步态再训练和下肢强化可能是 ERLLP 跑步者的临床干预措施。
