The Influence of Maturity Status on Muscle Architecture in School-Aged Boys
Radnor, John M.
Myer, Gregory D.
Lloyd, Rhodri S.
MetadataDangos cofnod eitem llawn
Purpose: To determine the differences in muscle architecture of the lower limb in pre-peak height velocity (PHV), circa-PHV, and post-PHV boys. Method: Muscle architecture variables from both the gastrocnemius medialis (GM) and vastus lateralis (VL) were derived from ultrasonographic images in 126 school-aged boys. One-way analysis of variance using Bonferroni post hoc comparisons was employed to determine between-group differences, and effect sizes were calculated to establish the magnitude of these differences. Results: All muscle architecture variables showed significant small to large increases from pre-PHV to post-PHV, excluding GM fascicle length (d = 0.59–1.39; P < .05). More discrete between-group differences were evident as GM and VL muscle thickness, and physiological thickness significantly increased between pre-PHV and circa-PHV (d > 0.57; P < .05); however, only the VL muscle thickness and physiological thickness increased from circa-PHV to post-PHV (d = 0.68; P < .05). The post-PHV group also showed larger GM pennation angles than the circa-PHV group (d = 0.59; P < .05). Conclusion: The combined results showed that maturation is associated with changes in muscle morphology. These data quantify that the maturity-related changes in muscle architecture variables provide a reference to differentiate between training-induced adaptations versus changes associated with normal growth and maturation.
Pediatric Exercise Science;
Radnor, J.M., Oliver, J.L., Waugh, C.M., Myer, G.D. and Lloyd, R.S. (2020) 'The Influence of Maturity Status on Muscle Architecture in School-Aged Boys', Pediatric Exercise Science, 32 (2) , pp. 89-96. https://doi.org/10.1123/pes.2019-0201
Dynodwr Gwrthrych Digidol (DOI)https://doi.org/10.1123/pes.2019-0201
Article published in Pediatric Exercise Science available at https://doi.org/10.1123/pes.2019-0201
Cardiff Metropolitan University (Grant ID: Cardiff Metropolian (Internal))
- Sport Research Groups 
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Muscle architecture and maturation influences sprint and jump ability in young boys: a multi-study approach Radnor, John M.; Oliver, Jon; Waugh, Charlie; Myer, Gregory; Lloyd, Rhodri S. (Lippincott, Williams and Wilkins, 2021-03-02)This series of experiments examined the influence of medial gastrocnemius (GM) and vastus lateralis (VL) muscle architecture (muscle thickness, pennation angle, and fascicle length) on sprint and jump performance in pre-, ...
The influence of growth, maturation and resistance training on muscle-tendon and neuromuscular adaptations: A narrative review Tumkur Anil Kumar, Nakul; Oliver, Jon; Lloyd, Rhodri S.; Pedley, Jason; Radnor, John M. (MDPI, 2021-05-08)The purpose of this article is to provide an overview of the growth, maturation and resistance training-related changes in muscle-tendon and neuromuscular mechanisms in youth, and the subsequent effect on performance. ...
Radnor, John M.; Oliver, Jon; Waugh, Charlie; Myer, Gregory; Moore, Isabel; Lloyd, Rhodri S. (Springer, 2017-09-12)Hopping, skipping, jumping and sprinting are common tasks in both active play and competitive sports. These movements utilise the stretch-shortening cycle (SSC), which is considered a naturally occurring muscle action for ...