IF: 1.90
Original Article

Acute unilateral leg vibration exercise improves contralateral neuromuscular performance
P.J. Marín1, T.J. Hazell2, M.T. García-Gutiérrez1, D.J. Cochrane3
1.
Laboratory of Physiology, European University Miguel de Cervantes, Valladolid, Spain
2.
Department of Kinesiology and Physical Education, University of Lethbridge, Lethbridge, Alberta
3.
School of Sport & Exercise, Massey University, Palmerston North, New Zealand
Abstract
Objectives: To examine the post-exercise cross-transfer effects of acute whole body vibration (WBV). Methods: Seventeen healthy male volunteers (20.8±1.2 y) performed three unilateral vibration conditions in a randomized order: 1) WBV-50 Hz [high amplitude]; 2) WBV-30 Hz [low amplitude]; and 3) a control no WBV condition (Sham) applied to the dominant leg. Each condition involved maximal voluntary isometric contractions (MVC) followed by three leg press explosive repetitions (40% MVC) with non-dominant and dominant legs; which were conducted prior to and post vibration (immediately; 2 min and 5 min). Surface electromyography (sEMG) of the vastus lateralis (VL) and medial gastrocnemius (MG) were measured throughout each condition. Results: A condition x leg x time interaction effect was detected (p=0.001) where 50 Hz-High in the stimulated leg enhanced mean velocity at post-2 min compared to 30 Hz-Low and Sham, remaining elevated at post-5 min. Similarly, 50 Hz-High in the non-stimulated leg increased mean velocity at post-immediately and post-2 min compared to 30 Hz-Low and Sham. There were no changes in sEMG of VL and GM in the stimulated and non-stimulated post-conditions. Conclusion: WBV (50 Hz) can augment cross-transfer in neuromuscular performance. WBV could provide an alternate method of unilateral training to promote cross education explosive strength.
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