Damla Karabay1, Sevgi Sevi Yesilyaprak2, Gonca Sahiner Picak3. 1. Department of Physiotherapy and Rehabilitation, Health Sciences Faculty, Izmir Katip Celebi University, No: 33/2, Balatcik, Cigli, Izmir, Turkey; Institute of Health Sciences, Dokuz Eylul University, Mithatpasa Street, No:1606, Inciralti Health Campus, Balcova, Izmir, Turkey. Electronic address: damla.gulpinar@ikcu.edu.tr. 2. School of Physical Therapy and Rehabilitation, Dokuz Eylul University, Mithatpasa Street, No:56/15, Inciralti Health Campus, Balcova, Izmir, Turkey. Electronic address: sevgi.subasi@deu.edu.tr. 3. Institute of Health Sciences, Dokuz Eylul University, Mithatpasa Street, No:1606, Inciralti Health Campus, Balcova, Izmir, Turkey; Faculty of Health Sciences, Izmir University of Economics, Sakarya Street, No:156, Balcova, Izmir, Turkey. Electronic address: gonca.sahiner@ieu.edu.tr.
Abstract
OBJECTIVES: To investigate the validity and intrarater and interrater reliability of eccentric strength testing of the shoulder abductors using a hand-held dynamometer (HHD) versus an isokinetic dynamometer. DESIGN: Methodological. SETTING: Research laboratory and athletic training room. PARTICIPANTS: Forty-seven asymptomatic shoulders of 25 participants were tested in 2 sessions by 2 physiotherapists. MAIN OUTCOME MEASURES: Eccentric strength of the shoulder abductors was measured from 120° to 30° scapular plane abduction using the HHD and isokinetic dynamometer. A gyroscope was used to validate the velocity. Spearman's rank correlation coefficients, intraclass correlation coefficient (ICC), standard error of measurement (SEM), and minimal detectable change (MDC) were calculated. RESULTS: The measurement protocol showed excellent intrarater (ICC[3,3] = 0.987, SEM = 2.59 Nm and MDC = 7.18 Nm) and interrater (ICC[3,3] = 0.990, SEM = 2.28 Nm and MDC = 6.32 Nm) reliability. HHD and isokinetic dynamometer measurements were strongly correlated (rho = 0.760, p < .001). Velocities during HDD testing were similar to those of the isokinetic dynamometer (30°/s) (p > .050). CONCLUSIONS: Eccentric strength testing of the shoulder abductors using an HHD is a valid and reliable method that can be used for research and clinical purposes when an isokinetic dynamometer cannot be used.
OBJECTIVES: To investigate the validity and intrarater and interrater reliability of eccentric strength testing of the shoulder abductors using a hand-held dynamometer (HHD) versus an isokinetic dynamometer. DESIGN: Methodological. SETTING: Research laboratory and athletic training room. PARTICIPANTS: Forty-seven asymptomatic shoulders of 25 participants were tested in 2 sessions by 2 physiotherapists. MAIN OUTCOME MEASURES: Eccentric strength of the shoulder abductors was measured from 120° to 30° scapular plane abduction using the HHD and isokinetic dynamometer. A gyroscope was used to validate the velocity. Spearman's rank correlation coefficients, intraclass correlation coefficient (ICC), standard error of measurement (SEM), and minimal detectable change (MDC) were calculated. RESULTS: The measurement protocol showed excellent intrarater (ICC[3,3] = 0.987, SEM = 2.59 Nm and MDC = 7.18 Nm) and interrater (ICC[3,3] = 0.990, SEM = 2.28 Nm and MDC = 6.32 Nm) reliability. HHD and isokinetic dynamometer measurements were strongly correlated (rho = 0.760, p < .001). Velocities during HDD testing were similar to those of the isokinetic dynamometer (30°/s) (p > .050). CONCLUSIONS: Eccentric strength testing of the shoulder abductors using an HHD is a valid and reliable method that can be used for research and clinical purposes when an isokinetic dynamometer cannot be used.
Authors: Aleksandra Królikowska; Anna Mika; Bartosz Plaskota; Maciej Daszkiewicz; Monika Kentel; Anna Kołcz; Maciej Kentel; Robert Prill; Dorota Diakowska; Paweł Reichert; Artur Stolarczyk; Łukasz Oleksy Journal: Biology (Basel) Date: 2022-04-11