1KU Leuven-University of Leuven, Department of Rehabilitation Science, Musculoskeletal Rehabilitation Research Center; 2KU Leuven-University of Leuven, UZ Leuven, Department of Experimental Medicine; 3KU Leuven-University of Leuven, Department of Biomedical Kinesiology, Exercise and Health Research Center; and 4Custom8 NV-Biomechanics Department, Leuven, Belgium.
J Strength Cond Res. 2014 Apr;28(4):1065-71. doi: 10.1519/JSC.0000000000000242.
The aim of the present study was to evaluate the vibration transmission from a vibration platform through Vectran cables to the upper body and its relationship to induced muscular activation. Fifteen clinically healthy participants performed 3 different arm exercises-biceps curl, triceps curl, and lateral raise. Vibration transmission to the upper body was assessed over a wide range of accelerations (from 1.90 to 5.98 g) and frequencies (from 25 to 40 Hz). To assess the vibration transmission, 7 triaxial accelerometers were attached from the hand up to the head, and the root-mean-square of acceleration signal of each site-specific body point was calculated. Muscular activity of biceps brachii, triceps brachii, deltoid, and upper trapezius was recorded. The results showed a significant attenuation of the platform accelerations transmitted through the Vectran cables to the upper body. Handle vibration ranged between 27 and 44% of the acceleration delivered by the platform depending on platform vibration parameters (acceleration/frequency). Vibration increased the muscle activity of biceps brachii, triceps brachii, deltoid, and upper trapezius muscles significantly only during biceps curl exercises. No frequency or acceleration effect was found on the size of the muscle response. The results of the present study suggest that a cable-pulley resistance system on a vibration platform channels the vibration safely from the platform to the arms and induces additional muscle activation in some arm muscles when biceps curl exercises are performed.
本研究的目的是评估通过 Vectran 电缆从振动平台传递到上半身的振动及其与诱导肌肉激活的关系。十五名临床健康的参与者进行了三种不同的手臂运动——二头肌弯举、三头肌弯举和侧平举。在广泛的加速度（从 1.90 到 5.98g）和频率（从 25 到 40Hz）下评估了振动传递到上半身的情况。为了评估振动传递，将 7 个三轴加速度计从手部一直附着到头部，并计算每个特定身体部位的加速度信号的均方根值。记录肱二头肌、肱三头肌、三角肌和上斜方肌的肌肉活动。结果表明，平台通过 Vectran 电缆传递到上半身的加速度有明显衰减。手柄振动范围在平台加速度的 27%至 44%之间，具体取决于平台振动参数（加速度/频率）。振动仅在进行二头肌弯举运动时显著增加了肱二头肌、肱三头肌、三角肌和上斜方肌的肌肉活动。未发现肌肉反应大小的频率或加速度效应。本研究的结果表明，振动平台上的电缆滑轮阻力系统可以将振动安全地从平台传递到手臂，并在进行二头肌弯举运动时引起某些手臂肌肉的额外肌肉激活。
