BACKGROUND The purpose of this study was to investigate the efficacy of dance in the experienced older dancers compared to the inexperienced older adults. We explored the effect of dance on the composition of muscle groups and multi-muscle synergies stabilizing the center of pressure (COP) displacement in preparation to take a step during support surface translation. METHODS Eight dance experienced elderly participants were asked to take a step in response to support surface perturbations. Uncontrolled manifold analysis was used to identify muscle modes (M-modes) as factors in the muscle activation space. Variance components in the M-mode space and indices of M-mode synergy stabilizing COP displacement were computed. RESULTS The reciprocal M-modes were observed more frequently in the dance group than in the control group prior to the step initiation. Dance led to higher indices of multi-muscle synergies and earlier anticipatory synergy adjustments during preparation for making a step in response to the support surface translations. CONCLUSIONS Dance appeared to be associated with adjustments in both the composition of M-modes and M-mode co-variation patterns resulting in stronger synergies stabilizing COP coordinate in older adults. The results reported here could have clinical relevance when offering a dance approach to balance training for impaired individuals.

中文翻译：

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舞蹈对老年人多肌肉协同作用的影响：一项横断面研究。

背景技术本研究的目的是研究与没有经验的老年人相比，有经验的老年人舞蹈者的舞蹈效果。我们探索了舞蹈对肌肉群组成和稳定压力中心（COP）位移的多肌肉协同作用的影响，以准备在支撑表面平移过程中采取步骤。方法要求八名舞蹈经验丰富的老年参与者采取措施，以应对支撑面的扰动。使用不受控制的歧管分析来确定肌肉模式（M模式）作为肌肉激活空间中的因素。计算了M-模式空间的方差分量和稳定COP位移的M-模式协同作用的指数。结果在开始舞步之前，在舞蹈组中比在对照组中更频繁地观察到相互的M型。在准备响应支撑表面平移的步骤期间，舞蹈导致较高的多肌肉协同作用指数和较早的预期协同作用调整。结论舞蹈似乎与M型和M型共变模式组成的调整有关，从而导致更强的协同作用，稳定了老年人的COP坐标。当提供一种舞蹈方法来平衡残障人士的训练时，此处报道的结果可能具有临床意义。结论舞蹈似乎与M型和M型共变模式组成的调整有关，从而导致更强的协同作用，稳定了老年人的COP坐标。当提供一种舞蹈方法来平衡残障人士的训练时，此处报道的结果可能具有临床意义。结论舞蹈似乎与M型和M型共变模式组成的调整有关，从而导致更强的协同作用，稳定了老年人的COP坐标。当提供一种舞蹈方法来平衡残障人士的训练时，此处报道的结果可能具有临床意义。