Souza Richard B, Hatamiya Nicolas, Martin Carly, Aramaki Andrew, Martinelli Brian, Wong Jamie, Luke Anthony
Department of Physical Therapy and Rehabilitation Science, University of California, San Francisco, 185 Berry Street, Suite 350, San Francisco, CA 94107; and Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA.
Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA.
PM R. 2015 Aug;7(8):823-830. doi: 10.1016/j.pmrj.2015.02.016. Epub 2015 Mar 7.
To investigate the prevalence and characteristics of recreational runners with medial and lateral heel whips.
Observational cohort study.
Clinical research laboratory.
A total of 256 recreationally active runners and joggers participated.
High-definition video was acquired from a posterior view while runners ran at a self-selected pace on a treadmill. Heel whips, defined as the medial or lateral rotation of the foot in the transverse plane during initial swing, were measured with Dartfish software. Subjects were stratified by direction (medial and lateral) and severity (W_5-10 = 5-10 degrees; W_10+ = >10 degrees) of heel whip. Body mass index and gender comparisons, as well as measurement reliability, also were explored.
Mean heel whip angle across runners was 0.4 degrees (medial) with a standard deviation of 9.2 degrees. Of the 512 feet analyzed, 274 (54%) demonstrated a 5 degree whip or greater. There was a similar number of medial and lateral heel whips observed (27% each). Female runners were twice as likely to demonstrate a lateral heel whip of greater than 8.9 degrees. Overweight runners had more medially directed whips when compared with normal and underweight runners.
More than half of the recreational runners studied were observed to have a medial or lateral heel whip of greater than 5 degrees. These data reveal the age, body mass index, and gender distribution of recreational runners with and without heel whips.
调查足跟内外侧鞭打动作的休闲跑步者的患病率及特征。
观察性队列研究。
临床研究实验室。
共有256名休闲跑步和慢跑者参与。
当跑步者在跑步机上以自定速度跑步时，从后方拍摄高清视频。使用Dartfish软件测量足跟鞭打动作，即初始摆动阶段足部在横平面内的内旋或外旋。根据足跟鞭打动作的方向（内侧和外侧）和严重程度（W_5 - 10 = 5 - 10度；W_10+ =>10度）对受试者进行分层。还探讨了体重指数和性别比较以及测量可靠性。
跑步者的平均足跟鞭打角度为0.4度（内侧），标准差为9.2度。在分析的512只脚中，274只（54%）表现出5度或更大的鞭打动作。观察到的足跟内侧和外侧鞭打动作数量相似（各占27%）。女性跑步者出现大于8.9度外侧足跟鞭打动作的可能性是男性的两倍。与正常体重和体重过轻的跑步者相比，超重跑步者的足跟鞭打动作更多向内。
在所研究的休闲跑步者中，超过一半被观察到有大于5度的足跟内侧或外侧鞭打动作。这些数据揭示了有或无足跟鞭打动作的休闲跑步者的年龄、体重指数和性别分布情况。
