Hoffman Scott E, Peltz Cathryn D, Haladik Jeffrey A, Divine George, Nurse Matthew A, Bey Michael J
Henry Ford Health Systems, Department of Orthopaedic Surgery, Bone and Joint Center, 2799W. Grand Blvd., E&R 2015, Detroit, MI 48202, United States.
Henry Ford Health Systems, Department of Orthopaedic Surgery, Bone and Joint Center, 2799W. Grand Blvd., E&R 2015, Detroit, MI 48202, United States.
Gait Posture. 2015 Mar;41(3):825-9. doi: 10.1016/j.gaitpost.2015.02.017. Epub 2015 Mar 7.
Running-related injuries are common and previous research has suggested that the magnitude and/or rate of pronation may contribute to the development of these injuries. Accurately and directly measuring pronation can be challenging, and therefore previous research has often relied on navicular drop (under both static and dynamic conditions) as an indirect assessment of pronation. The objectives of this study were to use dynamic, biplane X-ray imaging to assess the effects of three footwear conditions (barefoot, minimalist shoes, motion control shoes) on the magnitude and rate of navicular drop during running, and to determine the association between static and dynamic measures of navicular drop. Twelve healthy distance runners participated in this study. The magnitude and rate of navicular drop were determined by tracking the 3D position of the navicular from biplane radiographic images acquired at 60Hz during the stance phase of overground running. Static assessments of navicular drop and foot posture were also recorded in each subject. Footwear condition was not found to have a significant effect on the magnitude of navicular drop (p=0.22), but motion control shoes had a slower navicular drop rate than running barefoot (p=0.05) or in minimalist shoes (p=0.05). In an exploratory analysis, static assessments of navicular drop and foot posture were found to be poor predictors of dynamic navicular drop in all footwear conditions (p>0.18).
与跑步相关的损伤很常见，先前的研究表明，内旋的幅度和/或速率可能会导致这些损伤的发生。准确且直接地测量内旋具有挑战性，因此先前的研究常常依赖舟骨下降（在静态和动态条件下）作为内旋的间接评估方法。本研究的目的是使用动态双平面X射线成像来评估三种鞋类条件（赤足、极简主义鞋、运动控制鞋）对跑步过程中舟骨下降的幅度和速率的影响，并确定舟骨下降的静态和动态测量之间的关联。12名健康的长跑运动员参与了本研究。通过跟踪在地面跑步支撑阶段以60Hz采集的双平面放射图像中舟骨的三维位置来确定舟骨下降的幅度和速率。还记录了每个受试者舟骨下降和足部姿势的静态评估。未发现鞋类条件对舟骨下降的幅度有显著影响（p = 0.22），但运动控制鞋的舟骨下降速率比赤足跑步（p = 0.05）或穿极简主义鞋跑步（p = 0.05）时要慢。在一项探索性分析中，发现在所有鞋类条件下，舟骨下降和足部姿势的静态评估都不能很好地预测动态舟骨下降（p > 0.18）。
