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Intrarater Test-Retest Reliability of Hip Abduction, Internal Rotation, and External Rotation Strength Measurements in a Healthy Cohort Using a Handheld Dynamometer and a Portable Stabilization Device: A Pilot Study

OBJECTIVE: To investigate the within-day and between-day test-retest reliability of hip abduction, internal rotation, and external rotation strength measurements taken using a portable device externally stabilizing a handheld dynamometer in healthy participants. DESIGN: Observational study. SETTING:...

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Detalles Bibliográficos
Autores principales: Byrne, Aaron, Lodge, Clare, Wallace, Jennifer
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7853325/
https://www.ncbi.nlm.nih.gov/pubmed/33543077
http://dx.doi.org/10.1016/j.arrct.2020.100050
Descripción
Sumario:OBJECTIVE: To investigate the within-day and between-day test-retest reliability of hip abduction, internal rotation, and external rotation strength measurements taken using a portable device externally stabilizing a handheld dynamometer in healthy participants. DESIGN: Observational study. SETTING: Institute of Technology Carlow, Ireland, a third-level education institute. PARTICIPANTS: Healthy participants (N=18; 11 male, 7 female) who participate in a field sport for more than 2 hours per week were recruited via convenience sampling. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Hip abduction, internal rotation, and external rotation peak force during a maximal voluntary isometric contraction (N). The 3 best values recorded for each movement for each day were used to analyze within-day and between-day test-retest reliability. Intraclass correlation coefficients (ICCs), coefficients of variance, standard error of measurement, and minimal detectable change statistics were also calculated. RESULTS: External fixation of a handheld dynamometer produced excellent test-retest reliability for within-day (ICC>0.934) and between-day (ICC>0.802) contexts. CONCLUSIONS: Clinical measurements of hip strength can be performed reliably, efficiently, and cost effectively using the methods described. Furthermore, the use of external fixation eliminates the influence of tester strength on the handheld dynamometry measurements.