Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong.
Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong.
Phys Ther Sport. 2020 Mar;42:139-145. doi: 10.1016/j.ptsp.2020.01.011. Epub 2020 Jan 21.
To assess the biomechanical changes following a systematic gait retraining to modify footstrike patterns from rearfoot strike (RFS) to midfoot strike (MFS).
Pre-post interventional study. All participants underwent a gait retraining program designed to modify footstrike pattern to MFS.
Research laboratory.
Twenty habitual RFS male runners participated.
Gait evaluations were conducted before and after the training. Footstrike pattern, vertical loading rates, ankle and knee joint stiffness were compared.
Participants' footstrike angle was reduced (p < 0.001, Cohen's d = 1.65) and knee joint stiffness was increased (p = 0.003, Cohen's d = 0.69). No significant difference was found in the vertical loading rates (p > 0.155). Further subgroup analyses were conducted on the respondents (n = 8, 40% of participants) who exhibited MFS for over 80% of their footfalls during the post-training evaluation. Apart from the increased knee joint stiffness (p = 0.005, Cohen's d = 1.14), respondents exhibited a significant reduction in the ankle joint stiffness (p = 0.019, Cohen's d = 1.17) when running with MFS.
Gait retraining to promote MFS was effective in reducing runners' footstrike angle, but only 40% of participants responded to this training program. The inconsistent training effect on impact loading suggests a need to develop new training protocols in an effort to prevent running injuries.
评估系统步态再训练后生物力学变化，以改变从足跟（RFS）到中足（MFS）的足触地模式。
前后干预研究。所有参与者都接受了步态再训练计划，旨在改变足触地模式为 MFS。
研究实验室。
20 名习惯性 RFS 男性跑步者参与。
训练前后进行步态评估。比较足触地模式、垂直加载率、踝关节和膝关节刚度。
参与者的足触地角度减小（p<0.001，Cohen's d=1.65），膝关节刚度增加（p=0.003，Cohen's d=0.69）。垂直加载率无显著差异（p>0.155）。对在训练后评估中超过 80%的足触地表现为 MFS 的受访者（n=8，参与者的 40%）进行了进一步的亚组分析。除了膝关节刚度增加（p=0.005，Cohen's d=1.14）外，当以 MFS 跑步时，受访者的踝关节刚度也显著降低（p=0.019，Cohen's d=1.17）。
促进 MFS 的步态再训练可有效降低跑步者的足触地角度，但只有 40%的参与者对该训练计划有反应。对冲击负荷的不一致训练效果表明，需要制定新的训练方案，以努力预防跑步受伤。
