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Assessment of reliability in isokinetic testing among adolescent basketball players

Humberto M Carvalho, Manuel Coelho e Silva, Enio Ricardo Vaz Ronque, Rui S Gonçalves, Renaat Philippaerts and Robert M Malina (2011) MEDICINA-LITHUANIA. 47(8). p.446-452
abstract
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 degrees 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 60 s(-1) in adolescent basketball players. Age, maturity status, and training experience of young athletes should be considered when testing knee isokinetic strength at 60 degrees s(-1).
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
VELOCITY, PROFILES, WRESTLERS, VARIABLES, PERFORMANCE, AGE, LEG STRENGTH, PEAK TORQUE, anthropometry, young athletes, strength, maturation, BIODEX, VALIDITY
journal title
MEDICINA-LITHUANIA
Med. Lith.
volume
47
issue
8
pages
446 - 452
Web of Science type
Article
Web of Science id
000299192700006
JCR category
MEDICINE, GENERAL & INTERNAL
JCR impact factor
0.423 (2011)
JCR rank
116/153 (2011)
JCR quartile
4 (2011)
ISSN
1010-660X
language
English
UGent publication?
yes
classification
A1
copyright statement
I have retained and own the full copyright for this publication
id
2060712
handle
http://hdl.handle.net/1854/LU-2060712
date created
2012-03-06 13:46:10
date last changed
2016-12-19 15:42:22
@article{2060712,
  abstract     = {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 degrees 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{\textlangle}0.05) with eccentric knee extension within-variation between two sessions. Training experience (r=-0.37, P{\textlangle}0.05) and initial values of concentric knee flexion (r=-0.62, P{\textlangle}0.01) were correlated with concentric knee flexion within-subject differences. Within-subject variation of eccentric knee extension was correlated (P{\textlangle}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 60 s(-1) in adolescent basketball players. Age, maturity status, and training experience of young athletes should be considered when testing knee isokinetic strength at 60 degrees s(-1).},
  author       = {Carvalho, Humberto M and Coelho e Silva, Manuel and Vaz Ronque, Enio Ricardo and Gon\c{c}alves, Rui S and Philippaerts, Renaat and Malina, Robert M},
  issn         = {1010-660X},
  journal      = {MEDICINA-LITHUANIA},
  keyword      = {VELOCITY,PROFILES,WRESTLERS,VARIABLES,PERFORMANCE,AGE,LEG STRENGTH,PEAK TORQUE,anthropometry,young athletes,strength,maturation,BIODEX,VALIDITY},
  language     = {eng},
  number       = {8},
  pages        = {446--452},
  title        = {Assessment of reliability in isokinetic testing among adolescent basketball players},
  volume       = {47},
  year         = {2011},
}

Chicago
Carvalho, Humberto M, Manuel Coelho e Silva, Enio Ricardo Vaz Ronque, Rui S Gonçalves, Renaat Philippaerts, and Robert M Malina. 2011. “Assessment of Reliability in Isokinetic Testing Among Adolescent Basketball Players.” Medicina-lithuania 47 (8): 446–452.
APA
Carvalho, Humberto M, Coelho e Silva, M., Vaz Ronque, E. R., Gonçalves, R. S., Philippaerts, R., & Malina, R. M. (2011). Assessment of reliability in isokinetic testing among adolescent basketball players. MEDICINA-LITHUANIA, 47(8), 446–452.
Vancouver
1.
Carvalho HM, Coelho e Silva M, Vaz Ronque ER, Gonçalves RS, Philippaerts R, Malina RM. Assessment of reliability in isokinetic testing among adolescent basketball players. MEDICINA-LITHUANIA. 2011;47(8):446–52.
MLA
Carvalho, Humberto M, Manuel Coelho e Silva, Enio Ricardo Vaz Ronque, et al. “Assessment of Reliability in Isokinetic Testing Among Adolescent Basketball Players.” MEDICINA-LITHUANIA 47.8 (2011): 446–452. Print.