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Assessment of Reliability in Isokinetic Testing Among Adolescent Basketball Players.
MedLine Citation:
PMID:  22123556     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND. The reproducibility of day-to-day testing of isokinetic concentric and eccentric muscular actions among adolescent basketball players aged 14 to 16 years and relationships of mean within-subject variation in two isokinetic testing sessions with chronological age, biological maturation (estimated age at peak height velocity), training experience, body size, lower-body morphology, and initial strength performance were evaluated. MATERIAL AND METHODS. The sample included 27 basketball players who completed replicate test sessions of 5 repetitions of reciprocal concentric and eccentric knee extensions and flexions at 60 º s(-1). A randomly selected subsample of 8 players completed a third testing session to confirm reliability estimates. RESULTS. Coefficients of variation (CV) between sessions 1 and 2 ranged from 8.1% to 17.4%, and intraclass coefficients (ICCs) ranged from 0.72 to 0.89. For sessions 1 and 3, CVs ranged from 3.9% to 6.0%, and ICCs ranged from 0.95 to 0.99. The initial level of strength of eccentric knee flexion (r=-0.43) and eccentric knee extension (r=-0.42) were correlated (P<0.05) with eccentric knee extension within-variation between two sessions. Training experience (r=-0.37, P<0.05) and initial values of concentric knee flexion (r=-0.62, P<0.01) were correlated with concentric knee flexion within-subject differences. Within-subject variation of eccentric knee extension was correlated (P<0.05) with chronologic age (r=0.41), estimated age at peak height velocity (r=-0.38), body size (r=0.41 to 0.47), and leg volume (r=0.39). CONCLUSIONS. Familiarization sessions may improve the reliability of concentric and eccentric knee isokinetic strength testing at 60º s(-1)in adolescent basketball players. Age, maturity status, and training experience of young athletes should be considered when testing knee isokinetic strength at 60º s(-1).
Authors:
Humberto M Carvalho; Manuel J Coelho E Silva; Enio Ricardo Vaz Ronque; Rui S Gonçalves; Renaat M Philippaerts; Robert M Malina
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-18
Journal Detail:
Title:  Medicina (Kaunas, Lithuania)     Volume:  47     ISSN:  1648-9144     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9425208     Medline TA:  Medicina (Kaunas)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Faculdade de Ciências do Desporto e Educação Física, Estádio Universitário Coimbra Pavilhão-III, 3040-156 Coimbra, Portugal. hmoreiracarvalho@gmail.com.
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