ArticleHealthcare (Basel, Switzerland)2023
The Effects of Body Positions and Abduction Angles on Shoulder Muscle Activity Patterns during External Rotation Exercises.
Article in Healthcare (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
4 citing papers in PubMed.
- The effects of shoulder abduction angle and elastic band resistance on shoulder muscle activity during external rotation exercises.Scientific reports · 2026Article
- The relationship between shoulder external rotation strength, horizontal abduction, and glenohumeral distance ratios in professional baseball pitchers.Journal of physical therapy science · 2025Article
- Comparing Single and Dual Plating in Displaced Scapular Body Fractures: A Retrospective Study of Clinical and Functional Outcomes.Journal of clinical medicine · 2025Article
- Changes in Shoulder Girdle Muscle Activity and Ratio During Pilates-Based Exercises.Life (Basel, Switzerland) · 2025Article
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Authors and funding
4 authors.
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Abstract
backgroundExcess and repetitive glenohumeral external rotation (ER) is at a higher risk for shoulder injuries, which occurs frequently in professional sports and specific occupations. Current rehabilitation programs emphasize selective targeting of muscle activity, which can help restore dysfunctional muscle imbalances or prevent injuries. However, the impact of different body postures on GH muscle activity during ER exercises has not been fully understood. Therefore, the purpose of this study was to investigate shoulder EMG activity for different body positions and humeral abduction angles during ER exercises.
methodTwenty-three healthy young men (age: 22.3 ± 2.3, height: 175.75 ± 4.02, mass: 75.37 ± 9.14) participated in this study. Surface Electromyography was recorded from seven shoulder muscles: upper trapezius, lower trapezius, serratus anterior, infraspinatus, and deltoid. Six ER exercises: three postures (sitting, supine lying, and prone lying) and two abduction angles (ABD; 45° and 90°) were tested using an isokinetic dynamometer.
resultsDuring a sitting position, the lower trapezius/upper trapezius muscle activity ratios were significantly increased for sitting compared to supine lying and prone lying (
conclusionThese findings can provide insight into new training programs aimed at restoring GH muscle imbalances.
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