Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, HONG KONG SAR.
Department of Biomedical Engineering, Boston University, Boston, MA.
Med Sci Sports Exerc. 2019 Sep;51(9):1904-1908. doi: 10.1249/MSS.0000000000002007.
Running gait retraining via peak tibial shock biofeedback has been previously shown to reduce impact loading and mitigate running-related symptoms. In previous research, peak tibial shock is typically measured and trained for one limb at a single constant training speed during all training sessions. The goal of this study was to determine how runners transfer learning in the trained limb to the untrained limb at different unconstrained speeds.
Thirteen runners (3 females, age = 41.1 ± 6.9 yr, running experience = 6.8 ± 4.4 yr, weekly running distance = 30.7 ± 22.2 km) underwent running gait biofeedback retraining via continuous tibial acceleration measured at the right distal tibia. Before and after the training, participants were asked to run at their self-selected constrained training speeds (2.8 ± 0.2 m·s) and at 110% and 90% of the training speed. Pretraining and posttraining peak tibial shock values for each limb were compared.
Participants reduced peak tibial shock in the trained limb by 35% to 37% (P < 0.05, Cohen's d = 0.78-0.85), and in the untrained limb by 20% to 23% (P < 0.05, Cohen's d = 0.51-0.71) across the three testing speeds. The reduction was not significantly different between the trained and untrained limbs (P = 0.31-0.79, Cohen's d = 0.18-0.45). Similarly, there was no difference in peak tibial shock reduction among the three running speeds (P = 0.48-0.61, Cohen's d = 0.06-0.45).
Participants demonstrated transfer learning effects evidenced by concomitant reduced peak tibial shock in the untrained limb, and the learning effects were retrained when running at a 10% variance of the training speed.
通过峰值胫骨冲击生物反馈进行跑步步态再训练已被证明可以降低冲击负荷并减轻与跑步相关的症状。在之前的研究中，通常在所有训练课程中以单一恒定训练速度测量和训练一条腿的峰值胫骨冲击。本研究的目的是确定跑步者如何在不同的无约束速度下将训练腿的学习转移到未训练腿。
13 名跑步者（3 名女性，年龄=41.1±6.9 岁，跑步经验=6.8±4.4 岁，每周跑步距离=30.7±22.2 公里）通过连续测量右侧胫骨远端的胫骨加速度进行跑步步态生物反馈再训练。在训练前后，参与者被要求以自己选择的约束训练速度（2.8±0.2 m·s）和训练速度的 110%和 90%进行跑步。比较了每条腿的训练前后峰值胫骨冲击值。
参与者将训练腿的峰值胫骨冲击降低了 35%至 37%（P<0.05，Cohen's d=0.78-0.85），未训练腿的峰值胫骨冲击降低了 20%至 23%（P<0.05，Cohen's d=0.51-0.71）在三个测试速度。训练腿和未训练腿之间的减少没有显着差异（P=0.31-0.79，Cohen's d=0.18-0.45）。同样，在三个跑步速度之间，峰值胫骨冲击的降低没有差异（P=0.48-0.61，Cohen's d=0.06-0.45）。
参与者表现出转移学习效应，表现为未训练腿的峰值胫骨冲击降低，当以训练速度 10%的变化率跑步时，学习效应得到重新训练。
