Testing of the Maximal Dynamic Output Hypothesis in Trained and Untrained Subjects
- ASU Author/Contributor (non-ASU co-authors, if there are any, appear on document)
- N. Travis Triplett Ph.D., Professor (Creator)
- Institution
- Appalachian State University (ASU )
- Web Site: https://library.appstate.edu/
Abstract: The maximal dynamic output
(MDO) hypothesis is a newly proposed concept, which
suggests that the muscular system of the lower limbs is
designed to produce maximal power output when performing
countermovement vertical jumping (CMJ) at body mass as
opposed to other loading conditions. However, it is unclear if
the MDO concept can be applied to individuals with different
levels of maximal strength. The purpose of this investigation was
to determine if subjects, who have distinct differences in
maximal strength, maximize CMJ power at body mass. Fourteen
male strength-power trained subjects (squat 1 repetition
maximum (1RM)-to-body mass ratio = 1.96 +- 0.24) and
6 untrained male subjects (squat 1RM-to-body mass ratio =
0.94 +- 0.18) completed CMJs with loads that were less than,
equal to, and greater than body mass. Loads less than body
mass were accomplished with a custom-designed unloading
apparatus, and loads greater than body mass were accomplished
with a barbell and weights. In both groups, mean values
for CMJ peak and mean power were greatest during the body
mass jump. Power outputs at body mass were significantly
different (p <= 0.05) than power outputs at various conditions
of loading and unloading. These data support the MDO
hypothesis and its application to individuals with significantly
different 1RM-to-body mass ratios. Additionally, these data
further support the idea that body mass CMJs are a theoretically
sound way to train for power because of the maximal power
outputs that are produced during this condition.
Testing of the Maximal Dynamic Output Hypothesis in Trained and Untrained Subjects
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Created on 6/16/2011
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Additional Information
- Publication
- Nuzzo, J.L., McBride, J.M., Dayne, A.M., Israetel, M.A., Dumke, C.L., and Triplett, N.T. (2010) Testing of the maximal dynamic output hypothesis in trained and untrained subjects. Journal of Strength and Conditioning Research 24(5), 1269-1276. Published by National Strength and Conditioning Association (ISSN: 1533-4287). Original version available from publisher’s web site: http://www.nsca-lift.org
- Language: English
- Date: 2010