Document Detail


Effect of relative changes in anthropometry during childhood on muscular power production in pedaling: a biomechanical simulation.
MedLine Citation:
PMID:  18714119     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
When performing skillful movement muscular and nonmuscular forces act in concert to produce a resultant force that complies with the goal of the task. Nonmuscular forces are directly dependent on the anthropometry of the performer. The purpose of this study was to determine the effect of age-related changes in relative anthropometric characteristics between 5 and 10 years of age on muscular power production during pedaling. A secondary purpose was to determine the dependence of this effect on movement speed. A torque-driven model of two-legged pedaling was used to track experimental kinematics and forces obtained from 6 experienced adult cyclists pedaling at 60 and 120 rpm. Relative anthropometric characteristics were modified to simulate pedaling for children of 5, 7.5, and 10 years of age. Analyses of variance revealed that age-related differences in anthropometry did not affect the muscular contribution to crank power (p > .05), while they had a significant effect on the muscular contribution to limb power (p < .05). Adjustments by the proximal muscle groups (muscles spanning the hip and knee joints) were necessary to account for anthropometry-driven changes in nonmuscular power. These effects were independent of movement speed. Our results provide researchers with useful information to interpret age-related differences in muscular power production more accurately.
Authors:
Thomas Korff; Jody L Jensen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pediatric exercise science     Volume:  20     ISSN:  0899-8493     ISO Abbreviation:  Pediatr Exerc Sci     Publication Date:  2008 Aug 
Date Detail:
Created Date:  2008-08-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8909729     Medline TA:  Pediatr Exerc Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  292-304     Citation Subset:  IM    
Affiliation:
Centre for Sports Medicine and Human Performance, Brunel University, Uxbridge UK.
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