Actively Recruiting
Impact of Neuromuscular Control With and Without Electrical Stimulation and Long-term Effect of Kinetic Chain Exercises in Multidirectional Shoulder Instability Patients
Led by National Taiwan University Hospital · Updated on 2026-05-28
60
Participants Needed
1
Research Sites
6 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
Researchers are studying multidirectional shoulder instability (MDI), which often affects adolescents and young females, especially those with hypermobility spectrum disorder (HSD) or hypermobile Ehlers-Danlos syndrome (hEDS). These conditions cause joint laxity and frequent shoulder dislocations, leading to pain, muscle tension, and instability that can disrupt daily activities and sports. The study aims to explore shoulder joint movement, muscle activity, and the impact of electrical stimulation on shoulder muscles in patients with MDI alongside HSD or hEDS. The study involves two main interventions: neuromuscular electrical stimulation (NMES) and neuromuscular control training (NMCT). NMES uses a portable device to deliver electrical impulses to specific shoulder muscles to stimulate contraction, while NMCT involves guided isometric exercises supervised by a physical therapist to help center the humeral head during shoulder movements. Participants perform these exercises during controlled isometric contractions in various shoulder positions to assess muscle response and joint stability. Participants will take part in assessments measuring shoulder stability and muscle activation, including changes in acromiohumeral and humeroglenoid distances during different stimulation conditions and exercises. The Western Ontario Shoulder Index (WOSI) will be used to evaluate shoulder function at baseline, 4 weeks, and 8 weeks after intervention. Safety and muscle activity will be monitored throughout, with participants observed for any adverse effects. The total study duration and follow-up extend through these assessment periods to evaluate treatment impact.
CONDITIONS
Brief Title
Impact of Neuromuscular Control With and Without Electrical Stimulation and Long-term Effect of Kinetic Chain Exercises in Multidirectional Shoulder Instability Patients
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Age between 20 and 50 years old
- Diagnosis of multidirectional shoulder instability with generalized joint hypermobility (Beighton score 24 4/9)
- Shoulder laxity verified in at least two directions during clinical examination
- Shoulder pain lasting at least three months before the study
- Signs of shoulder instability in daily life without a traumatic cause
- Ability to raise the arm above 120 degrees without experiencing subluxation or dislocation
You will not qualify if you...
- Shoulder pain caused by trauma
- History of shoulder fractures or dislocations
- Cervical radiculopathy
- Degenerative joint disease of the shoulder
- Previous shoulder surgery
- Frozen shoulder
- Pain score greater than 5 during experimental movements
- Redness, swelling, or open wounds on the skin within the experimental area
- Sensory abnormalities
- Cognitive impairment
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - 8 weeks
Participants undergo neuromuscular control training with or without electrical stimulation to improve shoulder stability under the supervision of a physical therapist.
Weekly visits for training sessions and assessments
Duration - Up to week 8 after intervention start
Participants are assessed to measure the effects of the intervention on shoulder function and stability.
Assessments at baseline, week 4, and week 8
Trial Site Locations
Total: 1 location
1
School and graduate institution of physical therapy
Taipei, Taiwan, 100
Actively Recruiting
Research Team
J
Jiu Jenq Lin
How is the study designed?
Study Type
INTERVENTIONAL
Masking
DOUBLE
Allocation
NON_RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
2
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