Colorado State University, Fort Collins, Colorado, USA.
School of Physical Therapy and Rehabilitation Science, University of Montana, Missoula, Montana, USA.
J Mot Behav. 2020;52(3):360-371. doi: 10.1080/00222895.2019.1635983. Epub 2019 Jul 22.
High impact forces during running have been associated with tibial stress injuries. Previous research has demonstrated increasing step rate will decrease impact forces during running. However, no research has determined the cognitive demand of gait retraining. The primary purpose was to determine the cognitive demand and effectiveness of field-based gait retraining. We hypothesized that in-field gait retraining would alter running mechanics without increasing cognitive workload as measured by EEG following learning. Runners with a history of tibial injury completed a gait retraining protocol which included a baseline run, retraining phase, practice phase, and re-assessment following retraining protocol. Results demonstrated an increase in the theta, beta, and gamma power within prefrontal cortex during new learning and corresponding return to baseline following skill acquisition and changes across alpha, beta, gamma, mu, and theta in the motor cortex ( < .05). In the midline superior parietal cortex, spectral power was greater for theta activity during new learning with a corresponding alpha suppression. Overall, the results demonstrated the use of EEG as an effective tool to measure cognitive demand for implicit motor learning and the effectiveness of in-field gait retraining.
在跑步过程中，高冲击力与胫骨压力性损伤有关。先前的研究表明，增加步频会降低跑步时的冲击力。然而，目前还没有研究确定步态再训练的认知需求。主要目的是确定基于场地的步态再训练的认知需求和效果。我们假设，在现场进行步态再训练将改变跑步力学，而不会像学习后通过 EEG 测量那样增加认知工作量。有胫骨损伤史的跑步者完成了一项步态再训练方案，其中包括基线跑步、再训练阶段、练习阶段以及再训练方案后的重新评估。结果表明，在前额叶皮层中，theta、beta 和 gamma 功率在新学习期间增加，并且在技能获得后相应地恢复到基线，并且在运动皮层中 alpha、beta、gamma、mu 和 theta 发生变化（<.05）。在中线顶叶皮层中，theta 活动的频谱功率在新学习期间更大，同时伴随着 alpha 抑制。总的来说，结果表明使用 EEG 作为一种有效工具来测量隐性运动学习的认知需求以及现场步态再训练的效果。
