Effects of Eccentric Versus Concentric Strengthening in Patients With Subacromial Pain Syndrome: A Randomized Controlled Trial

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dc.contributor.authorKarabay, Damla
dc.contributor.authorYesilyaprak, Sevgi Sevi
dc.contributor.authorErduran, Mehmet
dc.contributor.authorOzcan, Cem
dc.date.accessioned2025-03-20T09:50:45Z
dc.date.available2025-03-20T09:50:45Z
dc.date.issued2025
dc.departmentİzmir Bakırçay Üniversitesi
dc.description.abstractBackground: Subacromial pain syndrome (SPS) is the most common cause of shoulder pain. Therapeutic exercise is the first-line treatment for SPS; however, the ideal exercise type remains unclear. Here, we compared the effects of eccentric and concentric strengthening in patients with SPS. Hypothesis: Adding isolated eccentric strengthening to a multimodal physiotherapy program (MPP) would lead to greater improvements in outcomes compared with either MPP alone or adding isolated concentric strengthening to the MPP. Study Design: Randomized controlled trial. Level of Evidence: Level 2. Methods: A total of 45 patients were randomized to eccentric strengthening (ESG), concentric strengthening (CSG), and control (CG) groups; all groups received the MPP. The strengthening groups also performed group-specific strengthening. Shoulder pain, abduction and external rotation (ER) strength, joint position sense (JPS), the Constant-Murley Score (CMS), and the Disabilities of the Arm, Shoulder and Hand score were collected at baseline, after 12 weeks of treatment, and at week 24. Results: For CMS, ESG exhibited a greater, but not clinically meaningful, improvement than CSG and CG (P < 0.05). Eccentric abduction strength increased in ESG compared with CG. From baseline to follow-up, abduction strength increased in ESG compared with CSG and CG. Eccentric abduction strength increased in CSG compared with CG. JPS at abduction improved in the ESG compared with CG. Other between-group comparisons were not significant (P > 0.05). Conclusion: In SPS, eccentric strengthening provided added benefits, improving shoulder abduction strength and JPS at abduction, and was superior to concentric strengthening for improving shoulder abduction strength. Neither strengthening approach had an additional effect on shoulder function, pain, ER strength, or rotational JPS. Clinical Relevance: Clinicians could implement eccentric strengthening as a motor control retraining for strength and proprioception gain rather than for pain relief and reducing disability.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK)
dc.description.sponsorshipThe present study was supported by The Scientific and Technological Research Council of Turkey (TUBITAK) within the scope of 2211-A General National Scholarship Program for PhD students.
dc.identifier.doi10.1177/19417381241236817
dc.identifier.endpage331
dc.identifier.issn1941-7381
dc.identifier.issn1941-0921
dc.identifier.issue2
dc.identifier.pmid38532530
dc.identifier.scopus2-s2.0-85188731043
dc.identifier.scopusqualityQ1
dc.identifier.startpage322
dc.identifier.urihttps://doi.org/10.1177/19417381241236817
dc.identifier.urihttps://hdl.handle.net/20.500.14034/2293
dc.identifier.volume17
dc.identifier.wosWOS:001192100200001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherSage Publications Inc
dc.relation.ispartofSports Health-A Multidisciplinary Approach
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250319
dc.subjectproprioception
dc.subjectrehabilitation
dc.subjectresistance training
dc.subjectshoulder impingement syndrome
dc.titleEffects of Eccentric Versus Concentric Strengthening in Patients With Subacromial Pain Syndrome: A Randomized Controlled Trial
dc.typeArticle

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