Whole Body Vibration and Dynamic Restraint

Abstract

The purpose of this study was to identify changes due to whole body vibration in peroneus longus (PL) activation following ankle inversion perturbation. Participants were 22 (age 22.1 ± 1.8 yrs, ht 168.8 ± 8.2 cm, mass 65.5 ± 11.2 kg) physically active male and female students with no recent history of lower extremity injury. Measurements of PL electromechanical delay (EMD), reaction time, and muscle activation were collected from two groups (WBV and control) over 3 time intervals (pretreatment, posttreatment, and 30 min posttreatment). Two-way ANOVAs were used to compare groups over time for all dependent variables. No group × time interactions were detected (p < 0.05) for any of the dependent variables. Whole body vibration did not alter PL EMD, reaction time, peak EMG, or average EMG. The use of WBV for enhancing ankle dynamic stability was not supported by this study. However, more data are needed to determine if WBV is an effective intervention in other areas of injury prevention or rehabilitation. These data were not consistent with the hypothesis that WBV enhances muscle spindle sensitivity.

Key words

ankle - muscle spindle sensitivity - joint stability

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