OLIVARES, Pedro R et al. Reliability of an isometric knee test in women with fibromialgia using the 12-week test-retest. []. , 21, 2, pp.70-75. ISSN 0121-8123.

Objective: The aim of this study was to analyze the reliability of peak torque assessed using an isometric strength protocol of knee flexor and extensor muscles. Material and methods: A total of 16 women with Fibromyalgia (FM) (aged 54.9 ± 12.1) participated in this study. The design consisted of a 12-week test-retest, and isometric peak torque was assessed using an isokinetic dynamometer (Biodex system 3). The evaluation consisted of 3 maximal isometric contractions of knee extensor and flexor muscles. Relative intraclass correlation coefficient ICC) and absolute (standard error of measurement SEM and smallest real difference SRD) reliability indices were calculated. Result and conclusions: Isometric peak torque assessed using isokinetic dynamometer is reliable in knee flexor and extensor muscles. This study presents data on the smallest real difference of peak torque in isometric actions of knee flexor and extensor muscles, which can help interpreting results obtained in physical activity based therapies in individuals with FM of several weeks duration.

: Reliability; Reproducibility; Isometric dynamometry; Muscle strength; Fibromyalgia.

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