Abstract
Enhancing vertical jump performance is critical for many sports. Following high intensity training, individuals often experience exercise induced muscle damage (EIMD). Many recovery modalities have been tested with conflicting results. The purpose of this investigation was to determine the effect of whole-body vibration (WBV) on vertical jump performance following EIMD. 27 females volunteered for 7 sessions and were randomly assigned to a treatment or control group and administered each testing day. Vertical jump performance was assessed via vertical jump height (VJH), peak power output (PPO), rate of force development (RFD), relative ground reaction force (GRFz), and peak activation ratio of the vastus medialis (VM) via electromyography (EMG) before and after 3 days of EIMD via split squats. Two testing sets were collected each day, consisting of pre measures followed by WBV or control, and then post second measures. A 2x8 (group x time) mixed factor analysis of variance (ANOVA) was conducted for each variable. No significant interactions or group differences were found in any variable. Significant main effects for time were found in any variable, indicating performance declined following muscle damage. These results indicate that WBV does not aid in muscle recovery or vertical jump performance following EIMD.
Highlights
Resistance training is a common exercise and training tool to increase muscular strength, hypertrophy and endurance
Many recovery modalities have been tested with conflicting results. The purpose of this investigation was to determine the effect of whole-body vibration (WBV) on vertical jump performance following exercise induced muscle damage (EIMD). 27 females volunteered for 7 sessions and were randomly assigned to a treatment or control group and administered each testing day
Vertical jump performance was assessed via vertical jump height (VJH), peak power output (PPO), rate of force development (RFD), relative ground reaction force (GRFz), and peak activation ratio of the vastus medialis (VM) via electromyography (EMG) before and after 3 days of EIMD via split squats
Summary
Resistance training is a common exercise and training tool to increase muscular strength, hypertrophy and endurance. EIMD presents as tenderness, pain, swelling, and muscle stiffness (McHugh et al, 1999) and it has been suggested that these symptoms are related to an inflammatory process. This is based on a lack of evidence of neural inhibition of damaged muscle (McHugh et al, 1999) or changes in motor unit activation (Sayers, Knight, Clarkson, Van Wegen, & Kamen, 2001). Muscle soreness has been shown to occur initially from the inflammatory process with production of prostaglandin E2 observed at 24, 48, and 72 hours (Friden et al, 1983) which sensitizes type III and IV afferent fibers of muscle connective tissue, which are highly correlated with DOMS (Connolly, Sayers, & McHugh, 2003)
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