An observational study in Adhesive Capsulitis of the Shoulder, sponsored by Ankara Yildirim Beyazıt University. Completed at 1 site in Turkey (Türkiye). Open to participants aged 40 Years to 70 Years. Per ClinicalTrials.gov, last updated 2026-10-29.
Sponsored by Ankara Yildirim Beyazıt University · Observational
This prospective observational study examined muscle structure, stiffness, and activation in adults aged 40 to 70 years with unilateral adhesive capsulitis. Thirty-two participants completed a single assessment of both shoulders using ultrasound, shear-wave elastography, surface electromyography, and shoulder-function questionnaires. The affected shoulder was compared with the asymptomatic contralateral shoulder, and affected-side findings were compared between pain-dominant (freezing) and stiffness-dominant (frozen) phases. The study did not assign a treatment or intervention.
This was a prospective, single-center observational study with a cross-sectional assessment and within-participant comparison of the affected and asymptomatic contralateral shoulders. Adults aged 40-70 years with unilateral adhesive capsulitis were recruited consecutively from the Department of Orthopedics and Traumatology outpatient clinic at Ankara Etlik City Hospital, Ankara, Türkiye, from July 2024 through February 2026. Thirty-two participants completed all assessments.
Participants were classified as being in the freezing phase (visual analog scale pain score 6-10; n=15) or frozen phase (score 0-5; n=17). No treatment was assigned by the study. Bilateral ultrasound was used to measure muscle thickness, fascicle length, physiological cross-sectional area, and pennation angle of the supraspinatus, infraspinatus, teres minor, and anterior, middle, and posterior deltoid. Shear-wave elastography was used to measure muscle Young's modulus. Surface electromyography was recorded during dumbbell scaption and normalized to maximal voluntary isometric contraction.
Shoulder function was assessed with the Constant-Murley Score, UCLA Shoulder Scale, ASES, DASH, QuickDASH, and Oxford Shoulder Score. Primary analyses compared the affected and contralateral shoulders. Secondary analyses compared affected-side measures between phases and examined associations between muscle measures and function scores. All assessments were performed in a single session before initiation of any new treatment.
383 studies on the registry are indexed under Bursitis; 111 are open to participants now.
This study's enrollment of 32 is below the median of 50 across 29 observational studies indexed under Bursitis.
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Adults aged 40-70 years with unilateral adhesive capsulitis, consecutively recruited from the Orthopedics and Traumatology outpatient clinic at Ankara Etlik City Hospital, Ankara, Türkiye. Thirty-two participants were enrolled and completed the single-session assessment.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants with unilateral adhesive capsulitis classified in the freezing phase based on a visual analog scale pain score of 6-10. Actual enrollment: 15 participants.
Participants with unilateral adhesive capsulitis classified in the frozen phase based on a visual analog scale pain score of 0-5. Actual enrollment: 17 participants.
Side-to-Side Difference in Muscle Thickness
Ultrasound muscle thickness (cm) in the supraspinatus, infraspinatus, teres minor, and anterior, middle, and posterior deltoid; compare the affected shoulder with the asymptomatic contralateral shoulder.
Time frame: Baseline (single assessment at the initial study visit)
Side-to-Side Difference in Fascicle Length
Ultrasound fascicle length (cm) in the supraspinatus, infraspinatus, teres minor, and anterior, middle, and posterior deltoid; compare the affected shoulder with the asymptomatic contralateral shoulder.
Time frame: Baseline (single assessment at the initial study visit)
Side-to-Side Difference in Physiological Cross-Sectional Area
Ultrasound-derived physiological cross-sectional area (PCSA; cm²) for the supraspinatus, infraspinatus, teres minor, and deltoid subregions; compare the affected shoulder with the contralateral shoulder.
Time frame: Baseline (single assessment at the initial study visit)
Side-to-Side Difference in Pennation Angle
Ultrasound pennation angle (degrees) for the supraspinatus, infraspinatus, teres minor, and deltoid subregions; compare the affected shoulder with the contralateral shoulder.
Time frame: Baseline (single assessment at the initial study visit)
Side-to-Side Difference in Shear-Wave Elastography Stiffness
Mean Young's modulus (kPa) from three acquisitions for each muscle; compare the affected shoulder with the asymptomatic contralateral shoulder.
Time frame: Baseline (single assessment at the initial study visit)
Side-to-Side Difference in Normalized Surface EMG Activation
Mean root-mean-square amplitude during dumbbell scaption, normalized to maximal voluntary isometric contraction (%MVIC), for the supraspinatus, infraspinatus, teres minor, and deltoid subregions; compare the affected shoulder with the contralateral shoulder.
Time frame: Baseline (single assessment at the initial study visit)
Difference in Affected-Side Muscle Parameters Between Disease Phases
Compare affected-side muscle architecture, shear-wave elastography stiffness, and normalized EMG parameters between the freezing phase (VAS 6-10; n=15) and frozen phase (VAS 0-5; n=17).
Time frame: Baseline (single assessment at the initial study visit)
Association Between Affected-Side Muscle Parameters and Shoulder Function
Assess correlations between affected-side muscle architecture, shear-wave elastography stiffness, normalized EMG, and the Constant-Murley Score, UCLA Shoulder Scale, ASES, DASH, QuickDASH, and Oxford Shoulder Score.
Time frame: Baseline (single assessment at the initial study visit)
Plan to share: No — Individual participant data will not be shared to protect participants' privacy and confidentiality. Only aggregate data are reported.
No publications or documents are linked to this record.
Ran from Aug 2024 to primary completion in Oct 2024, 1 month.
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