Elbow flexor strength, muscle size, and moment arms in prepubertal boys and girls

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Elbow flexor strength, muscle size, and moment arms in prepubertal boys and girls

Please use this identifier to cite or link to this item: http://hdl.handle.net/10036/41782

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Title: Elbow flexor strength, muscle size, and moment arms in prepubertal boys and girls
Author: Wood, Louise
Dixon, Sharon J.
Grant, Chris
Armstrong, Neil
Citation: Pediatric Exercise Science, 18 (4), November 2006, pp. 457-469
Publisher: Human Kinetics
Journal: Pediatric Exercise Science
Date Issued: 2006-11
URI: http://hdl.handle.net/10036/41782
Links: http://www.humankinetics.com/pes/journalAbout.cfm
Abstract: The aim of this study was to examine elbow flexion torque, muscle cross-sectional area (CSA), and leverage in boys and girls. Thirty-eight prepubertal children (9.6 ± 0.3 years) volunteered to participate. All performed isometric flexion actions at 10°, 50°, and 90° of elbow flexion. Magnetic resonance imaging was used to assess elbow flexor (EF) muscle CSA and brachialis moment arm lengths. No significant gender differences were observed for any of the variables studied. EF CSA was directly proportional to isometric torque at 50° and 90°. CSA explained between 47% and 57% of torque variance. Moment arm estimates explained 19% of the variance in isometric torque at 90°. These baseline data contribute to our understanding of factors influencing strength variation during childhood.
Type: Article
Description: Copyright © 2006 Human Kinetics.
Keywords: elbow flexor torqueelbow flexionmuscle cross-sectional areamoment armsprepubertal
ISSN: 0899-8493


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