In recent years, whole body vibration (WBV) has been the subject of a great amount of research towards improving physical capabilities as a postactivation potentiation because the muscle spindle’s sensitivity can be increased (Rittweger, 2010). Typically, WBV is realized by the subject above the platform in squat position while the platform oscillates at differences intensities and amplitudes. Previous reports have shown that WBV produces preconditioning effects that lead an increase of power and flexibility (Jacobs & Burns, 2009), but controversial data exists that have shown no positive effect if an optimal dosage is not used in a controlled manner (Wilcock et al., 2009) and it has been suggested that the frequency may affect output (Turner et al., 2011). The purpose of this study was to investigate the effects of a single bout of whole-body vibration at two different frequencies on isometric lumbar extension (ELE), isometric deadlift (ID), posterior leg flexibility (PLF) and core muscle endurance test (CMET).



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