Affiliations: [a] Physical Education School, Federal University of Rio
Grande do Sul, Porto Alegre, Brazil | [b] College of Physical Education and Exercise Science,
University of Brasília, Brasília, Brazil | [c] California State University, Fullerton, Fullerton, CA, USA
Note: [] Corresponding author: Bruna Gonçalves Cordeiro da Silva,
%LAPEX, Physical Education School, Federal University of Rio Grande do Sul,
UFRGS, Felizardo Street, 750 – Jardim Botânico, 90690-200 Porto Alegre/RS,
Brazil. Tel.: +55 5133085817; +55 5133085894; Fax: +55 5133085843; E-mail: brugcs@hotmail.com
Abstract: OBJECTIVE: To determine the applicability and predictive
accuracy of an isoinertial resistance machine for the assessment of
hamstring/quadriceps conventional (concentric) ratio (CR). METHOD: Thirty-two resistance trained young men (23.53 ± 3.2 yrs) were tested
using dedicated instruments to obtain the peak torque (PT) of the right knee
extensors and flexors as well as the corresponding one repetition maximum (1RM)
values. All measurements were conducted in the concentric mode. RESULTS: Significant (p< 0.05) correlations were indicated between knee extensor
and flexor PT and 1RM values (r=0.73 to 0.75), as well as between PT and 1RM
CR values (r=0.65). However the isoinertial CR values (0.42 ± 0.05)
were significantly (p< 0.05) greater than their isokinetic counterparts
(0.36 ± 0.04). CONCLUSION: Caution should be used when comparing
isoinertial CR with population-specific isokinetic normative scores.
Keywords: Muscle strength dynamometers, leg muscle strength, 1-repetition maximum test, muscle balance
