Shoulder Exercises in Hypermobile Patients With Shoulder Symptoms

Hypermobility Spectrum Disorder (HSD) is a recent diagnosis that covers generalised joint hypermobility with one or more secondary symptomatic musculoskeletal manifestations. Current clinical management of this population with shoulder symptoms is based on limited evidence and includes a combination of non-specific physiotherapy modalities and exercise prescription. There is some evidence suggesting that strength training may be valuable for treatment of this patient-group. Therefore, the aim of this study is to evaluate the effectiveness of a heavy shoulder strengthening exercise programme in patients with HSD and shoulder symptoms.

Hypermobility Spectrum Disorder (HSD) is a recent diagnosis that covers generalised joint hypermobility with one or more secondary symptomatic musculoskeletal manifestations such as chronic shoulder pain and shoulder instability. The evidence for treatment is sparse, but current clinical management of this patient-group with persistent shoulder symptoms is a combination of non-specific physiotherapy modalities and exercise prescription. There is some evidence suggesting that strength training may be valuable for treatment of this patient-group. The intervention consisting of heavy shoulder strengthening exercises has recently been tested to be feasible, and since clinical improvements were seen, the intervention is ready to be studied in a randomised controlled trial. Therefore, the aim of this study is to evaluate the effectiveness of a heavy shoulder strengthening exercise programme and general advice as compared to shoulder stability exercises and general advice (current standard care) in patients with HSD and persistent shoulder symptoms. The primary hypothesis is that a heavy shoulder strengthening exercise programme is superior to standard care.

Sample size considerations: a clinically significant effect of 252 points or more out of 2100 points (SD = 350 points) between the two groups over the 16 weeks is desired, which with a two-sided significance of 0.05, a power of 0.9, and 16% dropout, requires a total of 100 patients. In case 100 patients are not included within 24 months, a stopping rule will be applied as soon as at least 76 patients are included, corresponding to a power of minimum 0.8.

Eligibility Criteria:
Inclusion Criteria:

* Men and women aged 18 - 65
* Generalized HSD (G-HSD) defined with Beighton score cut-off ≥ 5 for women up to the age of 50 years and ≥ 4 for those above 50 years and all men, or Historical HSD (H-HSD) if the Beighton score was 1 point below the age and sex-specific cut-off AND the five-part questionnaire (5PQ) was positive (= at least two positive items).
* Present with one or more secondary symptomatic musculoskeletal manifestations, defined as either

  1. musculoskeletal pain in minimum one shoulder for at least three months

     and/or
  2. recurrent joint dislocations or joint instability without a reported history of trauma defined as either a) minimum three atraumatic dislocations in same shoulder, b) minimum two atraumatic dislocations in two different joints (minimum one in the shoulder) occurring at different times, or c) medical confirmation of joint instability in minimum two joints (minimum one in the shoulder) not related to trauma.

Exclusion Criteria:

* Clinically suspected referred pain from the cervical spine
* Systemic inflammatory rheumatic diseases
* Connective tissue diseases (e.g. Marfans, Stickler's or Loeys Dietz syndromes, Ehlers-Danlos Syndromes except hypermobile type)
* Neurological diseases
* Pregnancy or childbirth within the past year or planning to get pregnant during the study period
* Shoulder surgery within the past year
* Steroid injection in the affected shoulder within three months
* Inability to speak and understand Danish.
* Unable to comply with protocol