Reliability of Contractile Properties of the Knee Extensor Muscles in Individuals with Post-Polio Syndrome

Eric L Voorn, Merel A Brehm, Anita Beelen, Arnold de Haan, Frans Nollet and Karin H L Gerrits

PLOS ONE, 2014, vol. 9, issue 7, 1-7

Abstract: Objective: To assess the reliability of contractile properties of the knee extensor muscles in 23 individuals with post-polio syndrome (PPS) and 18 age-matched healthy individuals. Methods: Contractile properties of the knee extensors were assessed from repeated electrically evoked contractions on 2 separate days, with the use of a fixed dynamometer. Reliability was determined for fatigue resistance, rate of torque development (MRTD), and early and late relaxation time (RT50 and RT25), using the intraclass correlation coefficient (ICC) and standard error of measurement (SEM, expressed as % of the mean). Results: In both groups, reliability for fatigue resistance was good, with high ICCs (>0.90) and small SEM values (PPS: 7.1%, healthy individuals: 7.0%). Reliability for contractile speed indices varied, with the best values found for RT50 (ICCs>0.82, SEM values

Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0101660

DOI: 10.1371/journal.pone.0101660

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