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Influence of muscle architecture on maximal rebounding in young boys

journal contribution
posted on 21.10.2021, 15:47 by John M. Radnor, Jon L. Oliver, Charlie M. Waugh, Gregory D. Myer, Rhodri S. Lloyd
The aims of the current study were to (a) investigate differences in maximal rebound jump kinetics in boys at different stages of maturity and (b) determine the relationship of muscle architecture characteristics to maximal rebound jump kinetics. One hundred twenty-seven male, secondary school children were categorized into maturity groups (pre–, circa–, and post–peak height velocity) based on their maturity offset value. Muscle architecture of the gastrocnemius medialis (GM) and vastus lateralis (VL) was evaluated at rest using B-mode ultrasonography. Subjects then performed maximal rebound jumps quantified on a force platform. There were moderate to large differences across all maturity groups for peak ground reaction force, impulse measures, and average power variables (d = 0.73–2.67; p < 0.05). Gastrocnemius medialis and VL muscle thickness explained between 38.5 and 55.8% of the variance in peak force, impulse, and power variables; however, muscle architecture was less important determinant of contact time, jump height, reactive strength index, rate of force development, eccentric velocity, concentric velocity, and allometrically scaled measures (3.3–17.2%). The current results indicate that most kinetics used during maximal vertical rebounding are greater in more mature boys. Furthermore, maturational increases in GM muscle architecture seem important for maximal vertical jumping and are specifically associated with increased force, power, and impulse measures. Practically, these findings may underline benefits in targeting resistance training activities that are focused to increase lower limb muscle mass to positively influence maximal rebounding kinetics in young boys.

History

Published in

Journal of Strength and Conditioning Research

Publisher

Lippincott, Williams & Wilkins

Acceptance Date

25/08/2021

Publication Date

12/10/2021

Version

AM (Accepted Manuscript)

Citation

Radnor, J.M., Oliver, J.L., Waugh, C.M., Myer, G.D. and Lloyd, R.S. (2021) 'Influence of Muscle Architecture on Maximal Rebounding in Young Boys', The Journal of Strength & Conditioning Research. DOI: 10.1519/JSC.0000000000004152

Print ISSN

1064-8011

Electronic ISSN

1533-4287

Cardiff Met Affiliation

  • Cardiff School of Sport and Health Sciences

Cardiff Met Authors

John M. Radnor Jon L. Oliver Rhodri S. Lloyd

Cardiff Met Research Centre/Group

  • Sport Research Groups

Copyright Holder

© The Publisher

Language

en