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The patterning of local variability during the acquisition of a novel whole-body continuous motor skill in young adults.
Experimental Brain Research ( IF 1.7 ) Pub Date : 2020-06-03 , DOI: 10.1007/s00221-020-05840-9
Matthew Beerse 1 , Kimberly E Bigelow 2 , Joaquin A Barrios 3
Affiliation  

There is increasing evidence that movement variability during motor skill acquisition plays a functional role. Specifically, initial variability might represent exploration of the possible motor space for solutions and error identification. Following practice, individuals might exploit a reduced amount of motor solutions to execute the task. While this variability pattern has been supported during discrete upper limb and multi-finger force tasks, there is a paucity of evidence for continuous whole-body motor tasks. Therefore, the purpose of this study was to characterize the role of variability during the acquisition of a whole-body continuous motor task across practice sessions in young adults. Twelve young adults aged 18–35-years participated in this study. Subjects practiced a novel, sagittal plane task, the kettlebell swing, using an online training video. We conducted an uncontrolled manifold analysis to partition local variability of the configuration of the kettlebell and body segments based on their impact on the position of the center-of-mass (COM) in the sagittal plane. Our results demonstrated that following initial practice, variability that did not affect the COM position remained elevated, suggesting sustained exploration of motor solutions. Following multiple practice sessions, variability related to motor solutions decreased, potentially indicating exploitation. The results from this study support the proposal that young adults initially utilize a range of motor solutions when acquiring a whole-body motor skill, followed by exploitation of stereotypic movement.



中文翻译:

在年轻人中获得新颖的全身连续运动技能期间的局部变异性模式。

越来越多的证据表明,运动技能获取过程中的运动变异性起着功能性作用。具体来说,初始可变性可能表示对解决方案和错误识别的可能电机空间的探索。按照惯例,个人可能会使用较少量的运动解决方案来执行任务。尽管在离散的上肢和多指力任务中支持了这种可变性模式,但是对于连续的全身运动任务却缺乏证据。因此,本研究的目的是表征在年轻人的整个练习过程中获取全身连续运动任务期间变异性的作用。十二名18-35岁的年轻人参加了这项研究。受试者练习了新颖的矢状平面任务,壶铃摇摆,使用在线培训视频。我们进行了不受控制的歧管分析,以基于壶铃和身体段对矢状面中的质心(COM)位置的影响来划分壶铃和身体段的局部变化。我们的结果表明,在最初的实践中,不影响COM位置的可变性仍然很高,这表明对电机解决方案的持续探索。经过多次练习后,与运动解决方案有关的可变性降低了,这可能表明存在剥削现象。这项研究的结果支持了这样的建议,即年轻人在获得全身运动技能时首先使用一系列运动解决方案,然后再利用定型运动。我们进行了不受控制的歧管分析,以基于壶铃和身体段对矢状面中的质心(COM)位置的影响来划分壶铃和身体段的局部变化。我们的结果表明,在最初的实践中,不影响COM位置的可变性仍然很高,这表明对电机解决方案的持续探索。经过多次练习后,与运动解决方案有关的可变性降低了,这可能表明存在剥削现象。这项研究的结果支持了这样的建议,即年轻人在获得全身运动技能时首先使用一系列运动解决方案,然后再利用定型运动。我们进行了不受控制的歧管分析,以基于壶铃和身体段对矢状面中的质心(COM)位置的影响来划分壶铃和身体段的局部变化。我们的结果表明,在最初的实践中,不影响COM位置的可变性仍然很高,这表明对电机解决方案的持续探索。经过多次练习后,与运动解决方案有关的可变性降低了,这可能表明存在剥削现象。这项研究的结果支持了这样的建议,即年轻人在获得全身运动技能时首先使用一系列运动解决方案,然后再利用定型运动。

更新日期:2020-06-03
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