Electromyographical Comparison of Four Common Shoulder Exercises in Unstable and Stable Shoulders
Joint Authors
Uhl, Tim L.
Sciascia, Aaron
Kuschinsky, Nina
Nitz, Arthur J.
Mair, Scott D.
Source
Rehabilitation Research and Practice
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-08-07
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
This study examines if electromyographic (EMG) amplitude differences exist between patients with shoulder instability and healthy controls performing scaption, prone horizontal abduction, prone external rotation, and push-up plus shoulder rehabilitation exercises.
Thirty nine subjects were categorized by a single orthopedic surgeon as having multidirectional instability (n=10), anterior instability (n=9), generalized laxity (n=10), or a healthy shoulder (n=10).
Indwelling and surface electrodes were utilized to measure EMG activity (reported as a % of maximum voluntary isometric contraction (MVIC)) in various shoulder muscles during 4 common shoulder exercises.
The exercises studied effectively activated the primary musculature targeted in each exercise equally among all groups.
The serratus anterior generated high activity (50–80% MVIC) during a push-up plus, while the infraspinatus and teres major generated moderate-to-high activity (30–80% MVIC) during both the prone horizontal and prone external rotation exercises.
Scaption exercise generated moderate activity (20–50% MVIC) in both rotator cuff and scapular musculature.
Clinicians should feel confident in prescribing these shoulder-strengthening exercises in patients with shoulder instability as the activation levels are comparable to previous findings regarding EMG amplitudes and should improve the dynamic stabilization capability of both rotator cuff and scapular muscles using exercises designed to address glenohumeral joint instability.
American Psychological Association (APA)
Sciascia, Aaron& Kuschinsky, Nina& Nitz, Arthur J.& Mair, Scott D.& Uhl, Tim L.. 2012. Electromyographical Comparison of Four Common Shoulder Exercises in Unstable and Stable Shoulders. Rehabilitation Research and Practice،Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-497763
Modern Language Association (MLA)
Sciascia, Aaron…[et al.]. Electromyographical Comparison of Four Common Shoulder Exercises in Unstable and Stable Shoulders. Rehabilitation Research and Practice No. 2012 (2012), pp.1-11.
https://search.emarefa.net/detail/BIM-497763
American Medical Association (AMA)
Sciascia, Aaron& Kuschinsky, Nina& Nitz, Arthur J.& Mair, Scott D.& Uhl, Tim L.. Electromyographical Comparison of Four Common Shoulder Exercises in Unstable and Stable Shoulders. Rehabilitation Research and Practice. 2012. Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-497763
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-497763