The Influence of Maturity Status on Muscle Architecture in School-Aged Boys
Radnor, John M.
Myer, Gregory D.
Lloyd, Rhodri S.
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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
Article published in Pediatric Exercise Science available at https://doi.org/10.1123/pes.2019-0201
Cardiff Metropolitan University (Grant ID: Cardiff Metropolian (Internal))
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