Test-retest reliability of isometric shoulder muscle strength during abduction and rotation tasks measured using the Biodex dynamometer

Croci, Eleonora; Born, Patrick; Eckers, Franziska; Nüesch, Corina; Baumgartner, Daniel; Müller, Andreas Marc; Mündermann, Annegret

doi:10.1016/j.jse.2023.03.025

Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-30247

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Test-retest reliability of isometric shoulder muscle strength during abduction and rotation tasks measured using the Biodex dynamometer
Authors:	Croci, Eleonora Born, Patrick Eckers, Franziska Nüesch, Corina Baumgartner, Daniel Müller, Andreas Marc Mündermann, Annegret
et. al:	No
DOI:	10.1016/j.jse.2023.03.025 10.21256/zhaw-30247
Published in:	Journal of Shoulder and Elbow Surgery
Volume(Issue):	32
Issue:	10
Page(s):	2008
Pages to:	2016
Issue Date:	10-Oct-2023
Publisher / Ed. Institution:	Elsevier
ISSN:	1058-2746 1532-6500
Language:	English
Subjects:	Constant score; Shoulder; Abduction; External rotation; Internal rotation; Isometric test; Dynamometer
Subject (DDC):	616.7: Diseases of musculoskeletal system and orthopaedics
Abstract:	Background: The Constant score (CS) is often used clinically to assess shoulder function and includes a muscle strength assessment only for abduction. The aim of this study was to evaluate the test-retest reliability of isometric shoulder muscle strength during various positions of abduction and rotation with the Biodex dynamometer and to determine their correlation with the strength assessment of the CS. Methods: Ten young healthy subjects participated in this study. Isometric shoulder muscle strength was measured during 3 repetitions for abduction at 10° and 30° abduction in the scapular plane (with extended elbow and hand in neutral position) and for internal and external rotation (with the arm at 15° abduction in the scapular plane and elbow flexed at 90°). Muscle strength tests with the Biodex dynamometer were measured in 2 different sessions. The CS was acquired only in the first session. Intraclass correlation coefficients (ICCs) with 95% confidence interval, limits of agreement, and paired t tests for repeated tests of each abduction and rotation task were calculated. Pearson's correlation between the strength parameter of the CS and isometric muscle strength was investigated. Results: Muscle strength did not differ between tests (P > .05) with good to very good reliabilities for abduction at 10° and 30°, external rotation and internal rotation (ICC >0.7 for all). A moderate correlation of the strength parameter of the CS with all isometric shoulder strength parameters was observed (r > 0.5 for all). Conclusion: Shoulder muscle strength for abduction and rotation measured with the Biodex dynamometer are reproducible and correlate with the strength assessment of the CS. Therefore, these isometric muscle strength tests can be further employed to investigate the effect of different shoulder joint pathology on muscle strength. These measurements consider a more comprehensive functionality of the rotator cuff than the single strength evaluation in abduction within the CS as both abduction and rotation are assessed. Potentially, this would allow for a more precise differentiation between the various outcomes of rotator cuff tears.
URI:	https://digitalcollection.zhaw.ch/handle/11475/30247
Fulltext version:	Published version
License (according to publishing contract):	CC BY 4.0: Attribution 4.0 International
Departement:	School of Engineering
Organisational Unit:	Institute of Mechanical Systems (IMES)
Appears in collections:	Publikationen School of Engineering

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Croci, E., Born, P., Eckers, F., Nüesch, C., Baumgartner, D., Müller, A. M., & Mündermann, A. (2023). Test-retest reliability of isometric shoulder muscle strength during abduction and rotation tasks measured using the Biodex dynamometer. Journal of Shoulder and Elbow Surgery, 32(10), 2008–2016. https://doi.org/10.1016/j.jse.2023.03.025

Croci, E. et al. (2023) ‘Test-retest reliability of isometric shoulder muscle strength during abduction and rotation tasks measured using the Biodex dynamometer’, Journal of Shoulder and Elbow Surgery, 32(10), pp. 2008–2016. Available at: https://doi.org/10.1016/j.jse.2023.03.025.

E. Croci et al., “Test-retest reliability of isometric shoulder muscle strength during abduction and rotation tasks measured using the Biodex dynamometer,” Journal of Shoulder and Elbow Surgery, vol. 32, no. 10, pp. 2008–2016, Oct. 2023, doi: 10.1016/j.jse.2023.03.025.

CROCI, Eleonora, Patrick BORN, Franziska ECKERS, Corina NÜESCH, Daniel BAUMGARTNER, Andreas Marc MÜLLER und Annegret MÜNDERMANN, 2023. Test-retest reliability of isometric shoulder muscle strength during abduction and rotation tasks measured using the Biodex dynamometer. Journal of Shoulder and Elbow Surgery. 10 Oktober 2023. Bd. 32, Nr. 10, S. 2008–2016. DOI 10.1016/j.jse.2023.03.025

Croci, Eleonora, Patrick Born, Franziska Eckers, Corina Nüesch, Daniel Baumgartner, Andreas Marc Müller, and Annegret Mündermann. 2023. “Test-Retest Reliability of Isometric Shoulder Muscle Strength during Abduction and Rotation Tasks Measured Using the Biodex Dynamometer.” Journal of Shoulder and Elbow Surgery 32 (10): 2008–16. https://doi.org/10.1016/j.jse.2023.03.025.

Croci, Eleonora, et al. “Test-Retest Reliability of Isometric Shoulder Muscle Strength during Abduction and Rotation Tasks Measured Using the Biodex Dynamometer.” Journal of Shoulder and Elbow Surgery, vol. 32, no. 10, Oct. 2023, pp. 2008–16, https://doi.org/10.1016/j.jse.2023.03.025.