Abstract
PURPOSE: The purpose of this study is to investigate the acute effects of a single bout of Whole-Body Vibration (WBV) on isometric upper extremity strength when applied to the upper extremities in females. METHODS: Fifteen college aged females (mean age: 25.8 + 10.48 years) participated in a dominant arm isometric chest press. Dominant arm mean and peak torque were measured with an isokinetic dynamometer. Subjects were then placed on a vibration platform in a modified push-up position, hands on the platform with elbows extended and knees off. Vibration exposure consisted of a frequency of 35Hz and displacement of 4mm, lasting 30 seconds. Subjects then repeated dominant arm isometric chest press with mean and peak torque being recorded. RESULTS: Descriptive statistics were calculated for all torque values, pre-vibration mean torque (78.87 ft-lbs +18.54), post-vibration mean torque (79.97 ft-lbs +20.54), pre-vibration peak (84.98 ft-lbs+19.94), and post-vibration peak (84.61 ft-lbs +21.82). Matched pairs t-Tests revealed no significant difference between pre- and post-vibration mean torque (p=0638) and no significant difference between pre- and post-vibration peak torque (p=.868). CONCLUSIONS: Results from this study suggest that acute WBV applied to the upper extremities does not increase isometric upper extremity strength in college aged females.
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