ASSOCIATION OF AGE WITH MUSCLE SIZE AND STRENGTH BEFORE AND AFTER SHORT-TERM RESISTANCE TRAINING IN YOUNG ADULTS

    Authors

    J. Lowndes; R. L. Carpenter; R. F. Zoeller; R. L. Seip; N. M. Moyna; T. B. Price; P. M. Clarkson; P. M. Gordon; L. S. Pescatello; P. S. Visich; J. M. Devaney; H. Gordish-Dressman; E. P. Hoffman; P. D. Thompson;T. J. Angelopoulos

    Comments

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    Abbreviated Journal Title

    J. Strength Cond. Res.

    Keywords

    magnetic resonance imaging; muscle cross-sectional area; isometric; strength; isotonic strength; supervised resistance training; GENDER COMPARISONS; UPPER EXTREMITIES; OLDER MEN; WOMEN; POWER; BONE; MASS; YR; Sport Sciences

    Abstract

    Lowndes, J, Carpenter, RL, Zoeller, RF, Seip, RL, Moyna, NM, Price, TB, Clarkson, PM, Gordon, PM, Pescatello, LS, Visich, PS, Devaney, JM, Gordish-Dressman, H, Hoffman, EP, Thompson, PD, and Angelopoulos, TJ. Association of age with muscle size and strength before and after short-term resistance training in young adults. J Strength Cond Res 23(7): 1915-1920, 2009-The purpose of this study was to assess the association of age with muscle mass and strength in a group of young adults before and after 12 weeks of progressive resistance training. Eight hundred twenty-six young males and females (age 24.34 +/- 5.69 yr, range 18-39 yr) completed a strictly supervised 12-week unilateral resistance training program of the nondominant arm. Isometric (maximal voluntary contraction [MVC]) and dynamic strength (1 repetition maximum [1RM]) of the elbow flexors and cross-sectional area (CSA) of the biceps-brachii using magnetic resonance imaging (MRI) scans were measured before and after training. Pearson correlation coefficients were calculated for size and strength variables and age. In addition, the cohort was divided into groups according to decade of life and differences assessed by analysis of variance. Age correlated significantly and positively with all pretraining measures of muscle size and strength (CSA: r = 0.191, p < 0.001; MVC: r = 0.109, p = 0.002; 1RM: r = 0.109, p = 0.002). Age was not related to the training-induced changes in CSA or MVC but was negatively associated with the change in 1RM (r = 20.217, p < 0.001). The study indicates that age does have a significant positive relationship with muscle size and strength in untrained young adults. Although age was negatively associated with improvements in 1RM, the effect of age was small relative to the improvements induced through resistance training, thus suggesting age does not limit response to training in any practical way during early adulthood.

    Journal Title

    Journal of Strength and Conditioning Research

    Volume

    23

    Issue/Number

    7

    Publication Date

    1-1-2009

    Document Type

    Article

    Language

    English

    First Page

    1915

    Last Page

    1920

    WOS Identifier

    WOS:000271569300001

    ISSN

    1064-8011

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