Physical therapy in sport : official journal of the Association of Chartered Physiotherapists in Sports Medicine · 2024
Reliability of isokinetic dynamometer for isometric assessment of ankle plantar flexor strength.
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Santy Fanny-May, Pernoud Anthony, Barrué-Belou Simon, Fourchet François, Bothorel Hugo, Samozino Pierre
Аннотация
OBJECTIVE: To evaluate isokinetic dynamometer reliability for isometric assessment of plantar flexor (PF) strength.
DESIGN: Cross-sectional.
SETTING: Testing by the same physiotherapist twice during a first session (repeatability) and once during a second session (reproducibility).
PARTICIPANTS: Twenty-two healthy subjects (44 ankles, 11 men/11 women).
MAIN OUTCOME MEASURES: Isometric PF peak torque, with and without body mass normalization, at 0° and +20° of plantar flexion. Measurement reliability was evaluated using intraclass correlation coefficient (ICC), standard error of measurement (SEM) and minimal detectable change (MDC).
RESULTS: Without normalization, measurement repeatability was excellent at 0° of plantar flexion (ICC, 0.94; SEM, 6.6%; MDC, 18.4%) compared with good repeatability at +20° (ICC, 0.85; SEM, 11.1%; MDC 30.6%). Measurement repeatability following normalization was good at 0° (ICC, 0.88; SEM, 5.2%; MDC, 14.4%) and +20° (ICC, 0.79; SEM, 10.2%; MDC, 28.1%). While reproducibility was good at 0° with normalization (ICC, 0.84; SEM, 5.9%; MDC, 16.3%) or excellent without (ICC 0.92; SEM 7.5%; MDC, 20.8%), it was moderate at +20° with normalization (ICC 0.71; SEM 11.3%; MDC, 31.3%) or good without (ICC 0.78; SEM 13.0%; MDC, 36.1%).
CONCLUSION: The reliability of PF maximal isometric strength is good/excellent at 0° of plantar flexion but moderate/good at +20°.
DESIGN: Cross-sectional.
SETTING: Testing by the same physiotherapist twice during a first session (repeatability) and once during a second session (reproducibility).
PARTICIPANTS: Twenty-two healthy subjects (44 ankles, 11 men/11 women).
MAIN OUTCOME MEASURES: Isometric PF peak torque, with and without body mass normalization, at 0° and +20° of plantar flexion. Measurement reliability was evaluated using intraclass correlation coefficient (ICC), standard error of measurement (SEM) and minimal detectable change (MDC).
RESULTS: Without normalization, measurement repeatability was excellent at 0° of plantar flexion (ICC, 0.94; SEM, 6.6%; MDC, 18.4%) compared with good repeatability at +20° (ICC, 0.85; SEM, 11.1%; MDC 30.6%). Measurement repeatability following normalization was good at 0° (ICC, 0.88; SEM, 5.2%; MDC, 14.4%) and +20° (ICC, 0.79; SEM, 10.2%; MDC, 28.1%). While reproducibility was good at 0° with normalization (ICC, 0.84; SEM, 5.9%; MDC, 16.3%) or excellent without (ICC 0.92; SEM 7.5%; MDC, 20.8%), it was moderate at +20° with normalization (ICC 0.71; SEM 11.3%; MDC, 31.3%) or good without (ICC 0.78; SEM 13.0%; MDC, 36.1%).
CONCLUSION: The reliability of PF maximal isometric strength is good/excellent at 0° of plantar flexion but moderate/good at +20°.