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The reliability of strength tests performed in elevated shoulder positions using a hand-held dynamometer

Citation

McLaine, S and Ginn, KA and Kitic, CM and Fell, JW and Bird, ML, The reliability of strength tests performed in elevated shoulder positions using a hand-held dynamometer, Journal of Sport Rehabilitation Article Epub ahead of print. ISSN 1056-6716 (2016) [Refereed Article]


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Copyright Statement

Accepted author manuscript version reprinted, by permission, from Journal of Sport Rehabilitation, 2016 (in press). Copyright Human Kinetics, Inc.

Official URL: http://journals.humankinetics.com/journal/jsr

DOI: doi:10.1123/jsr.2015-0034

Abstract

Context: The reliable measurement of shoulder strength is important when assessing the athlete involved in overhead activities. Swimmers' shoulders are subject to repetitive humeral elevation and consequently have a high risk of developing movement control issues and pain. Shoulder strength tests performed in positions of elevation assist with the detection of strength deficits that may impact on injury and performance. The reliability of isometric strength tests performed in positions of humeral elevation without manual stabilisation, which is a typical clinical scenario, has not been established.

Objective: To establish the relative and absolute intra-rater reliability of shoulder strength tests functional to swimming in three body positions commonly used in the clinical setting.

Design: Repeated measures, reliability study.

Setting: Research laboratory.

Subjects: Fifteen university students and staff (mean SD age 24 8.2 y) volunteered for the study.

Intervention: Isometric shoulder strength tests were performed in positions of humeral elevation (flexion and extension in 140 abduction in the scapular plane; internal and external rotation in 90 abduction) on subjects without shoulder pain in supine, prone and sitting. Subjects were tested by one examiner with a hand-held dynamometer and retested after 48 hours.

Main Outcome Measures: Relative reliability (ICC3,1) values with 95% CI. Absolute reliability was reported by minimal detectable change (MDC).

Results: Good to excellent intra-rater reliability was found for all shoulder strength tests (ICC 0.87-0.99). Intra-rater reliability was not affected by body position. MDC% was less than 16% for every test and less than or equal to 11% for tests performed in supine.

Conclusions: Shoulder flexion, extension, internal and external rotation strength tests performed in humeral elevation demonstrated excellent to good intra-rater reliability regardless of body position. A strength change of more than 15% in any position can be considered meaningful.

Item Details

Item Type:Refereed Article
Keywords:shoulder strength, reliability, hand-held dynamometer, overhead athlete
Research Division:Medical and Health Sciences
Research Group:Human Movement and Sports Science
Research Field:Exercise Physiology
Objective Division:Health
Objective Group:Health and Support Services
Objective Field:Evaluation of Health Outcomes
Author:McLaine, S (Ms Sally McLaine)
Author:Kitic, CM (Dr Cecilia Kitic)
Author:Fell, JW (Associate Professor James Fell)
Author:Bird, ML (Dr Marie-Louise Bird)
ID Code:103228
Year Published:2016
Deposited By:Health Sciences
Deposited On:2015-09-29
Last Modified:2017-05-22
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