Laboratory of Physiology, European University Miguel de Cervantes, Valladolid, Spain.
J Electromyogr Kinesiol. 2012 Jun;22(3):456-62. doi: 10.1016/j.jelekin.2012.02.003. Epub 2012 Mar 8.
The current study examined the effects of whole-body vibration (WBV) on upper and lower body muscle activity during static muscle contractions (squat and bicep curls). The use of WBV accessories such as hand straps attached to the platform and a soft surface mat were also evaluated. Surface electromyography (sEMG) was measured for the medial gastrocnemius (MG), vastus lateralis (VL), and biceps brachii (BB) muscles in fourteen healthy older adults (74.8±4.5 years; mean±SD) with a WBV stimulus at an acceleration of 40 m s(-2) (30 Hz High, 2.5 mm or 46 Hz Low, 1.1 mm). WBV increased lower body (VL and MG) sEMG vs baseline (no WBV) though this was decreased with the use of the soft mat. The addition of the bicep curl with hand straps had no effect on lower body sEMG. WBV also increased BB sEMG vs baseline which was further increased when using the hand straps. There was no upper body effect of the soft mat. This study demonstrates WBV increases both lower and upper body muscle activity in healthy older adults. Moreover, WBV accessories such as hand straps attached to the platform or a soft surface mat may be used to alter exercise intensity.
本研究考察了全身振动（WBV）对静态肌肉收缩（深蹲和二头肌弯举）时上下体肌肉活动的影响。还评估了使用 WBV 附件（如平台上的手带和软面垫）的效果。十四名健康老年人（74.8±4.5 岁；均值±标准差）接受 40 m s(-2)（30 Hz 高频，2.5 mm 或 46 Hz 低频，1.1 mm）的 WBV 刺激，测量其内侧腓肠肌（MG）、股外侧肌（VL）和肱二头肌（BB）的表面肌电图（sEMG）。与无 WBV 的基线相比，WBV 增加了下半身（VL 和 MG）的 sEMG，但使用软垫会降低这种效果。使用手带进行二头肌弯举对下半身 sEMG 没有影响。WBV 还增加了 BB 的 sEMG，而使用手带则进一步增加了 BB 的 sEMG。软垫对上半身没有影响。本研究表明，WBV 增加了健康老年人的上下体肌肉活动。此外，平台上附加的手带等 WBV 附件或软面垫可能用于改变运动强度。
