Low resonance frequency vibration affects strength of paretic and non-paretic leg differently in patients with stroke

• DOI: 10.1556/aphysiol.97.2010.2.3
• Publication Date: 2010-05-28T16:55:23Z
• Authors: József Tihanyi; R. Di Giminiani; T. Tihanyi; G. Gyulai; L. Trzaskoma; M. Horváth
• Keywords: Whole body vibration; Squat; Squatting position

The objective of the study was to investigate chronic effect low frequency whole body vibration (WBV) on isometric and eccentric strength knee extensors with different force exertion capacity. It hypothesized that (1) four-week WBV intervention domain would enhance muscle (2) improvement be more pronounced in weaker muscle. To test our hypothesis twenty patients acute stroke were recruited. Ten randomly assigned remaining ten served for control.The group received 20 Hz three times per week standing a platform half squat position meanwhile flexing extending joints placing weight from one leg other. Knee extensor determined under contraction before after intervention. Myoelectrical activity (EMG) vastus lateralis also measured.Significant revealed only. maximum torque EMG increased significantly both paretic non-paretic leg, but threefold greater group. No significant alteration found rate development. Maximum Mechanical work enhanced side only.The results indicate selection effective depends upon physical condition neuromuscular system. Low can increase weak muscles due impairment restricted activity.