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- W2806475296 abstract "PURPOSE: The reproducibility of isokinetic strength assessment for testing knee extensors (KE) and knee flexors (KF) was determined. The examination was performed on single measurements (peak torques) and also on conventional and functional ratios obtained from concentric (cc) and eccentric (ecc) contractions of the above mentioned muscle groups. METHODS: The sample was composed of 26 male adult athletes (aged 18.6-33.9 years) who completed two test sessions of five repetitions of reciprocal concentric and eccentric extensions and flexions at 60°.s-1. Intra-individual differences were tested using paired t-test and effect size was determined using cohen’s d-value. Cefficients of variation (%CV) and Intra-class correlation (ICC) were also calculated. RESULTS: Regarding peak torques, intra-individual mean differences were trivial for KEecc (t=0.176, p=0.86, d=0.08), small for KEcc (t=2.001, p=0.06, d=0.53) and KFecc (t=0.797, p=0.43, d=0.35) and moderate for KFcc (t=2.062, p=0.05, d=0.65). Although values of ICC (between 0.961 to 0.993), technical errors of measurement (TEM) ranged from 5.2 to 8.1 N.m and %CV fluctuated between 18.6% and 23.8%. Similar statistics were determined for conventional ratio (KFcc/KEcc: t=1.026, p=0.32, d=0.01, TEM=0.1, %CV=13.1%, ICC=0.956), functional extension ratio (KFecc/KEcc: t=1.911, p=0.07, d=0.01, TEM=0.1, %CV=14.9%, ICC=0.950 and functional flexion ratio (KFcc/KEecc: t=2.006, p=0.06, d=0.01, TEM=0.1, %CV=16.3%, ICC=0.977). CONCLUSIONS: The current study showed an apparent reasonable reliability for the isokinetic peak torques of knee extensors and knee flexors. Derived ratios showed higher values for %CV. Note, however, that the composite scores were obtained from information of the extensors and flexors at different angles and future research is recommended to assess the reproducibility of functional ratios using the torque of the numerator (knee flexor) at the specific angle of the knee extensor peak torque angle (denominator). Funding (FCT): SFRH/BD/101083/2014, SFRH/BPD/100470/2014, SFRH/BD/121441/2016 and CIDAF (UID/DTP/04213/2016)." @default.
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- W2806475296 date "2018-05-01" @default.
- W2806475296 modified "2023-10-16" @default.
- W2806475296 title "Reproducibility Of Isokinetic Strength Assessment Of Knee Extensors And Flexors Adopting Concentric And Eccentric Contractions" @default.
- W2806475296 doi "https://doi.org/10.1249/01.mss.0000536959.43425.ab" @default.
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