AI Article Synopsis
- The study explored the impact of isometric horizontal abduction (IHA) on shoulder muscle activity during wall push-up plus (WPP) and wall slide (WS) exercises in people with scapular winging (SW).
- It found that applying IHA significantly increased the activity of the serratus anterior (SA), upper trapezius (UT), lower trapezius (LT), and infraspinatus (IS), while decreasing pectoralis major (PM) activity.
- The results suggest using WPP and WS with IHA can enhance shoulder stability and could help manage the overactivation of PM in individuals with SW.
Article Abstract
Context: Wall push-up plus (WPP) and wall slide (WS) are commonly prescribed in early rehabilitation to increase serratus anterior (SA) muscle activity. For individuals with scapular winging (SW), synergistic muscles such as upper trapezius (UT) and pectoralis major (PM) may compensate for weak SA during scapular movement. However, no studies have applied isometric horizontal abduction (IHA) during WS in individuals with SW nor have compared it with WPP with IHA.
Objectives: This study compared the effects of IHA on shoulder muscle activity during WPP and WS exercises in individuals with SW.
Design: Cross-sectional study; 2-way repeated-measures analysis of variance was used to assess the statistical significance of observed differences in SA, UT, PM, lower trapezius (LT), and infraspinatus (IS) muscle activities.
Setting: Research laboratory.
Patients: We recruited 30 individuals with SW comprising 20 men and 10 women.
Interventions: The individuals performed WPP and WS exercises with and without IHA using Thera-Band.
Main Outcome Measures: Surface electromyography was used to measure muscle activity of the SA, UT, PM, LT, and IS during the isometric phase of WPP and WS. Maximal voluntary isometric contractions were recorded to normalize electromyographic data.
Results: There was no significant interaction between IHA application and exercise type for any of the shoulder muscles. IHA application increased SA (P = .008), UT (P = .001), LT (P = .009), and IS (P = .000) activities and decreased PM (P = .001) activity compared with those without IHA. WS exercises elicited higher PM (P = .017) and LT (P = .011) activities than WPP.
Conclusion: WPP and WS with IHA may be effective in increasing the muscle activities of shoulder stabilizers and preventing overactivation of PM activity. WPP may be recommended for individuals with overactivated PM, whereas WS may be used to increase LT activity.
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| http://dx.doi.org/10.1123/jsr.2022-0135 | DOI Listing |
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