Off-campus UNL users: To download campus access dissertations, please use the following link to log into our proxy server with your NU ID and password. When you are done browsing please remember to return to this page and log out.
Non-UNL users: Please talk to your librarian about requesting this dissertation through interlibrary loan.
Responses of mechanomyography, electromyography, and peak torque to three days of velocity-specific isokinetic training
The purpose of this investigation was to determine the effects of three days of velocity-specific isokinetic training on strength, mechanomyography (MMG), and electromyography (EMG). Thirty adult females were randomly assigned to a control (CON; n = 10), slow velocity training (SVT; n = 10), or fast velocity training (FVT; n = 10) group. All subjects performed maximal, concentric isokinetic muscle actions of the leg extensors at 30, 150, and 270°·s −1 on a Cybex II dynamometer for the determination of PT on visits 1 and 5. During each test, EMG and MMG measurements were recorded. The training groups performed 4 sets of 10 reps at 30°·s −1 (SVT group) or 270°·s−1 (FVT group) on visits 2, 3, and 4. For the SVT group, PT increased from pre-test to post-test at 30, 150, and 270°·s−1. The increase in PT at 30°·s−1 was greater than at 150 and 270°·s−1. For the FVT group, PT increased at 270°·s−1 only. There were no significant increases in PT for the CON group. There were no significant pre-test to post-test changes in EMG amplitude or MPF for any group at any velocity with the exception of a significant decrease in EMG amplitude from pre-test to post-test at 150°·s−1 for the CON group, and a significant increase in EMG MPF (VM muscle only) from pre-test to post-test at 270°·s−1 for the FVT group. There were no significant pre-test to post-test changes in MMG amplitude or MPF at any velocity for any group with the exception of increases in MMG amplitude at 150°·s−1 and 270°·s−1 for the SVT and FVT groups, respectively. The lack of a consistent pattern of increases for EMG and MMG amplitude and MPF suggested that the training-induced increases in PT were not due to increased muscle activation. Instead, the increased PT may have been due to decreased coactivation of the antagonist hamstrings muscles and/or coordination and learning of stabilizing muscles. ^
Health Sciences, Rehabilitation and Therapy|Health Sciences, Recreation
Coburn, Jared Wayne, "Responses of mechanomyography, electromyography, and peak torque to three days of velocity-specific isokinetic training" (2005). ETD collection for University of Nebraska - Lincoln. AAI3163987.