Hashish Rami, Samarawickrame Sachithra D, Sigward Susan, Azen Stanley P, Salem George J
Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA.
Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA.
Phys Ther Sport. 2018 Jan;29:93-100. doi: 10.1016/j.ptsp.2016.12.003. Epub 2016 Dec 10.
Recent investigations have revealed lower vertical loading rates and knee energy absorption amongst experienced barefoot runners relative to those who rear-foot strike (RFS). Although this has led to an adoption of barefoot running amongst many recreational shoe runners, recent investigations indicate that the experienced barefoot pattern is not immediately realized. Therefore, the purpose this investigation was to quantify changes in lower-extremity dynamics and clinical outcomes measures for habitually shod runners who perform a transition to barefoot running.
DESIGN & PARTICIPANTS: We examined lower-extremity dynamics and clinical outcomes for 26 RFS shod runners who performed an 8-10 week transition to barefoot running.
Runners were evaluated at the University of Southern California's Musculoskeletal Biomechanics Research Laboratory.
Foot-strike patterns, vertical load rates, and joint energetics were evaluated before and after the transition using inverse dynamics. Clinical assessments were conducted throughout the transition by two licensed clinicians.
Eighteen of the 26 runners successfully completed the transition: 7 maintained a RFS, 8 adopted a mid-foot strike (MFS), and 3 adopted a forefoot strike (FFS) during novice barefoot running. Following the transition, novice MFS/FFS runners often demonstrated reversions in strike-patterns and associated reductions in ankle energetics. We report no change in loading rates and knee energy absorption across transition time points. Importantly, there were no adverse events other than transient pain and soreness.
These findings indicate that runners do not innately adopt the biomechanical characteristics thought to lower injury risk in-response to an uninstructed barefoot running transition.
最近的研究表明，与后足着地（RFS）的跑步者相比，经验丰富的赤足跑步者的垂直负荷率较低，膝盖能量吸收较少。尽管这使得许多休闲跑鞋跑步者开始采用赤足跑步，但最近的研究表明，经验丰富的赤足跑步模式并非能立即实现。因此，本研究的目的是量化习惯穿鞋跑步的人在过渡到赤足跑步时下肢动力学和临床结果指标的变化。
我们检查了26名RFS穿鞋跑步者在进行8 - 10周赤足跑步过渡期间的下肢动力学和临床结果。
跑步者在南加州大学肌肉骨骼生物力学研究实验室接受评估。
在过渡前后使用逆动力学评估着地模式、垂直负荷率和关节能量学。在整个过渡过程中由两名持牌临床医生进行临床评估。
26名跑步者中有18名成功完成过渡：7名保持RFS模式，8名在新手赤足跑步时采用中足着地（MFS），3名采用前足着地（FFS）。过渡后，新手MFS/FFS跑步者经常表现出着地模式的逆转以及踝关节能量学的相应降低。我们报告在整个过渡时间点，负荷率和膝盖能量吸收没有变化。重要的是，除了短暂的疼痛和酸痛外，没有其他不良事件。
这些发现表明，跑步者不会在无指导的赤足跑步过渡中本能地采用被认为能降低受伤风险的生物力学特征。
