Honors Theses
Date of Award
2009
Document Type
Undergraduate Thesis
Department
Health, Exercise Science, and Recreation Management
First Advisor
Hugh Lamont
Relational Format
Dissertation/Thesis
Abstract
Purpose: The purpose of this experiment was to measure the differences in activation in four different conditions: maximum voluntary contraction with vibration (MVC + V), maximum voluntary contraction (MVC), vibration only (V), and control group with no vibration (C). Muscles of interest were tibialis anterior (TA), vastus medialis (VM), vastus lateralis (VL), and medial gastrocnemius (MG). This information was obtained for a larger study involving improvement of vertical leap through vibration conditions. Methods: A sample of 13 (n=13) recreationally females was studied. EMG electrodes were used to measure activations of the TA, VM, VL, and MG. Vibration was applied at 50 Hz and with displacement amplitudes of 4-6 mm. The data was filtered and normalized to MVC data (MVC = 100%). Results: Significant main effects were seen in Condition and Muscle x Condition (p < .05). No main effect was seen for Muscle (p > .05). Strong trends favoring MVC + V over MVC were seen but were not statistically significant (p = .051). T-tests showed that significant differences (p < .05) were seen at C for TA, VM, VL, and MG. In the V condition, VM saw significant effect (p = .001). VM, VL, and MG saw main effect (p < .05) in MVC + V condition, but TA did not (p > .05). Conclusion: Greatest changes in relative activation were seen in the TA and MG at MVC + V and V. Trends of increased relative activation were seen in muscles during vibration above what was found during MVC.
Recommended Citation
Lancaster, Margaret Jean, "Whole Body Vibration Effects on Activation of Lower Extremity Muscles in Recreationally Trained Females" (2009). Honors Theses. 2050.
https://egrove.olemiss.edu/hon_thesis/2050
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