对于受伤的跑步者而言，在新手赤足跑步过程中负荷的对称性是否得到改善？
Is symmetry of loading improved for injured runners during novice barefoot running?
作者信息
Tenforde Adam S, Ruder Matthew C, Jamison Steve T, Singh Pratham P, Davis Irene S
机构信息
Spaulding National Running Center, Spaulding Rehabilitation Hospital, Harvard Medical School, Cambridge, MA, United States.
Spaulding National Running Center, Spaulding Rehabilitation Hospital, Harvard Medical School, Cambridge, MA, United States.
出版信息
Gait Posture. 2018 May;62:317-320. doi: 10.1016/j.gaitpost.2018.03.043. Epub 2018 Mar 27.
BACKGROUND
As barefoot (BF) running provides important sensory information that influence landing patterns, it may also affect loading symmetry.
RESEARCH QUESTION
The purpose of this investigation was to examine whether symmetry of loading in a group of injured runners would be improved in a novice, barefoot condition.
METHODS
Cross-sectional design evaluating 67 injured RFS runners. Each subject ran on an instrumented treadmill, first with their habitual shod pattern and then in a BF condition with a FFS pattern, both at the same self-selected speed. Data were averaged over 10 footstrikes. Variables of interest included vertical average load rate, vertical instantaneous load rate, and resultant instantaneous load rate. Symmetry indices (SI) for full population and within quartiles were compared for each loadrate variable (P ≤ 0.05) to evaluate changes between conditions.
RESULTS
On average, symmetry of loading was similar in a novice BF condition of injured runners compared with their habitual RFS shod condition. However, a subanalysis of quartiles revealed that the injured runners with the highest asymmetry (greatest SI values) displayed significantly lower asymmetry when running BF for all three loadrate measures.
SIGNIFICANCE
The addition of sensory input during barefoot running only improves symmetry of loading when habitual loading is highly asymmetric.
背景
由于赤足跑步能提供影响着地模式的重要感觉信息，它也可能影响负荷对称性。
研究问题
本调查的目的是研究在新手赤足条件下，一组受伤跑步者的负荷对称性是否会得到改善。
方法
采用横断面设计，评估67名受伤的跑步者功能性短步幅（RFS）。每位受试者在装有仪器的跑步机上跑步，首先按照其习惯的穿鞋模式，然后以功能性扁平足（FFS）模式赤足跑步，两种情况均以相同的自我选择速度进行。数据在10次触地过程中进行平均。感兴趣的变量包括垂直平均负荷率、垂直瞬时负荷率和合成瞬时负荷率。对每个负荷率变量比较全人群以及四分位数内的对称性指数（SI）（P≤0.05），以评估不同条件之间的变化。
结果
平均而言，受伤跑步者在新手赤足条件下的负荷对称性与其习惯的RFS穿鞋条件相似。然而，四分位数的亚分析显示，对于所有三种负荷率测量，不对称性最高（对称性指数值最大）的受伤跑步者在赤足跑步时显示出明显更低的不对称性。
意义
只有当习惯负荷高度不对称时，赤足跑步时增加的感觉输入才会改善负荷对称性。
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