The influence of different intermittent myofeedback training schedules on learning relaxation of the trapezius muscle while performing a gross-motor task
The influence of different intermittent myofeedback training schedules on learning relaxation of the trapezius muscle while performing a gross-motor task
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DOI：
10.1007/s00421-004-1161-y
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发表时间：
2004-10-01
影响因子：
3
通讯作者：
Hermens, HJ
中科院分区：
文献类型：
--
作者：
Voerman, GE;Sandsjö, L;Hermens, HJ
本研究的目的是调查不同的间歇性肌反馈训练时间表的影响，所提供的灰姑娘为基础的肌反馈系统，对学习放松和抵抗灭绝的肌，在受试者执行单侧大运动任务。18名健康受试者在没有和有研究基线和学习放松反馈的情况下执行任务。随后，通过在没有反馈的情况下执行任务来研究对灭绝的抗性。大运动任务包括以恒定的速度在三个目标区域之间连续移动优势臂。受试者被随机分为三组，其特征在于连续3天进行任务的反馈时间表的顺序。当未达到80%休息的预设水平时，在5-、10-或20-s间隔后提供听觉反馈。使用相对休息时间（RRT）和均方根（RMS）参数对优势上斜方肌进行的双极表面肌电记录进行量化。学习放松被定义为RRT增加和RMS值降低。结果显示，10-s时间表的RRT水平最高，RMS降低。此外，10-s时间表在将肌肉休息提高到20%以上的能力方面是独特的，这可能被认为与预防肌痛有关。三个时间表都没有表现出对灭绝的抵抗力。得出的结论是，10秒的时间间隔是首选的5和20秒的时间表在执行单侧粗大运动任务的受试者学习的肌松。
The aim of this study was to investigate the influence of different intermittent myofeedback training schedules, as provided by a Cinderella-based myofeedback system, on learning relaxation and resistance to extinction of the trapezius muscle, in subjects performing a unilateral gross-motor task. Eighteen healthy subjects performed the task without and with feedback to study baseline and learning relaxation. Subsequently, resistance to extinction was investigated by performing the task without feedback. The gross-motor task consisted of continuously moving the dominant arm between three target areas at a constant pace. Subjects were randomly assigned into three groups, characterized by the sequence of feedback schedules with which the task was performed on 3 consecutive days. Auditory feedback was provided after a 5-, 10-, or 20-s interval when a pre-set level of 80% rest was not reached. Bipolar surface electromyography recordings performed at the dominant upper trapezius muscle were quantified using relative rest time (RRT) and root mean square (RMS) parameters. Learning relaxation was defined as an increase in RRT and a decrease in RMS values. Results showed the highest RRT levels as well as a decrease in RMS for the 10-s schedule. Additionally, the 10-s schedule was unique in its ability to elevate muscular rest above the 20% level, which may be considered relevant in preventing myalgia. None of the three schedules showed resistance to extinction. It was concluded that the 10-s interval was preferred over the 5- and 20-s schedules in learning trapezius relaxation in subjects performing a unilateral gross-motor task.