Allometric scaling of biceps strength before and after resistance training in men

    Authors

    R. F. Zoeller; E. D. Ryan; H. Gordish-Dressman; T. B. Price; R. L. Seip; T. J. Angelopoulos; N. M. Moyna; P. M. Gordon; P. D. Thompson;E. P. Hoffman

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    Med. Sci. Sports Exerc.

    Keywords

    muscle; exercise; MRI; modeling; MUSCLE STRENGTH; BODY-SIZE; FORCE; PERFORMANCE; ACTIVATION; YOUNG; RATIO; WOMEN; ELITE; MASS; Sport Sciences

    Abstract

    Robert F. Zoeller, R. F., E. D. Ryan, H. Gordish-Dressman, T. B. Price, R. L. Seip, T. J.Angelopoulos, N. M. Moyna, P. M. Gordon, P. D. Thompson, and E. P. Hoffman. Allometric Scaling of Biceps Strength before and after Resistance Training in Men. Med. Sci. Sports Exerc., Vol. 39, No. 6, pp. 1013-1019, 2007. Purpose: The purposes of this study were 1) derive allometric scaling models of isometric biceps muscle strength using pretraining body mass (BM) and muscle cross-sectional area (CSA) as scaling variables in adult males, 2) test model appropriateness using regression diagnostics, and 3) cross-validate the models before and after 12 wk of resistance training. Methods: A subset of FAMuSS (Functional SNP Associated with Muscle Size and Strength) study data (N = 136) were randomly split into two groups (A and B). Allometric scaling models using pretraining BM and CSA were derived and tested for group A. The scaling exponents determined from these models were then applied to and tested on group B pretraining data. Finally, these scaling exponents were applied to and tested on group A and B posttraining data. Results: BM and CSA models produced scaling exponents of 0.64 and 0.7 1, respectively. Regression diagnostics determined both models to be appropriate. Cross-validation of the models to group B showed that the BM model, but not the CSA model, was appropriate. Removal of the largest six subjects (CSA > 30 cm(2)) from group B resulted in an appropriate fit for the CSA model. Application of the models to group A posttraining data showed that both models were appropriate, but only the body mass model was successful for group B. Conclusion: These data suggest that the application of scaling exponents of 0.64 and 0.7 1, using BM and CSA, respectively, are appropriate for scaling isometric biceps strength in adult males. However, the scaling exponent using CSA may not be appropriate for individuals with biceps CSA > 30 cm(2). Finally, 12 wk of resistance training does not alter the relationship between BM, CSA, and muscular strength as assessed by allometric scaling.

    Journal Title

    Medicine and Science in Sports and Exercise

    Volume

    39

    Issue/Number

    6

    Publication Date

    1-1-2007

    Document Type

    Article

    Language

    English

    First Page

    1013

    Last Page

    1019

    WOS Identifier

    WOS:000247039100017

    ISSN

    0195-9131

    Share

    COinS