Group-based Exercise Training Programs for Military Members With Musculoskeletal Conditions

This randomized controlled trial will compare the mid- and long-term effects of group-based training programs with usual individual physiotherapy care for the treatment of musculoskeletal disorders in military. One hundred and twenty soldiers presenting one of the four targeted musculoskeletal disorders (low back pain, rotator cuff related pain, patellofemoral pain syndrome or lateral ankle sprain) will be recruited and randomly assigned to either a 12-weeks group-based training program or 12-weeks usual individual physiotherapy care.

Musculoskeletal disorders are a leading cause of morbidity and the most prevalent source of disability among soldiers. Their high prevalence in armed forces and limited resources have led to problems related to access to physical rehabilitation care. To increase access, supervised group-based exercise programs for the most prevalent musculoskeletal disorders (low back pain, patellofemoral pain, rotator cuff-related shoulder pain or lateral ankle sprain) have been developed at a Canadian Armed forces (CAF) base, but their effectiveness has not been evaluated. The primary objective of this randomized controlled trial is to evaluate the mid- and long-term effects of these group-based training programs on pain severity and functional limitations, in comparison with usual individual physiotherapy care. Secondary objectives include comparing both interventions in terms of health-related quality of life, pain-related fear, and patients' satisfaction.

One hundred and twenty soldiers with a new medical referral for physiotherapy services for one of the four targeted musculoskeletal disorders will be consecutively recruited. They will be randomly assigned to either group-based training program or usual individual physiotherapy care, and will take part in the assigned 12-week intervention. There will be four evaluation sessions over 26 weeks (baseline, week 6, 12 and 26). At each follow-up, functional limitations, pain severity, health-related quality of life and pain-related fears will be assessed. Patients satisfaction with treatment will also be evaluated at the end of the intervention period. A two-way repeated measures ANOVA will be used to analyze and compare the effects of the interventions.

The results of this randomized controlled trial will determine the effectiveness of group-based training programs compared to usual individual physiotherapy care. This new intervention model could represent an efficient, and more pro-active approach to manage a higher number of soldiers with musculoskeletal disorders. It could improve access to physical rehabilitation care and improve the health of soldiers.

Eligibility Criteria:
Inclusion Criteria:

* Aged between 18-60 years
* Present one of the four targeted musculoskeletal disorders:

Low back pain:

Inclusion - 1) Low back pain with or without radiation to the lower limbs, 2) minimal score of 17% on the Modified Oswestry Disability Index (ODI).

Exclusion - 1) history of surgery or fracture to the spinal column, 2) signs of upper motor neuron lesions (bilateral paresthesia, hyperreflexia or spasticity) or other red flags (e.g. fracture).

Patellofemoral pain syndrome:

Inclusion - 1) anterior knee pain during running or during at least two activities among: kneeling, squatting, and resisted knee extension 2) score lower than 85/100 on the Knee Outcomes Survey - Activity of Daily Living Scale (KOS- ADLS).

Exclusion - 1) history of knee surgery or patellar dislocation; 2) pain believed to originate either from meniscus (presence of joint line fullness and tenderness, McMurray sign, and positive Thessaly test) or from any knee ligament.

Rotator cuff-related shoulder pain:

Inclusion - 1) at least one positive finding in each of the following categories: a) painful arc of movement; b) positive Neer's or Kennedy-Hawkins Test; c) pain on resisted external rotation, resisted abduction or Empty Can Test 2) minimal score of 14 points on the Disabilities of the Arm, Shoulder and Hand (QuickDASH).

Exclusion - 1) history of shoulder surgery, fracture, capsulitis, or dislocation, 2) full thickness rotator cuff tear identified by imagery or clinical tests 3) cervicobrachialgia or shoulder pain reproduced by neck movements.

Lateral ankle sprain:

Inclusion - 1) unilateral lateral ankle sprain of \<6 weeks, 2) minimal score of 9 points on the Lower Extremity Functional Scale (LEFS).

Exclusion - 1) ankle fracture, 2) lateral ligaments not the principal injury (a high ankle/tibiofibular sprain).

Exclusion Criteria for all diagnosis:

1. Are unavailable to participate in a 12-week intervention;
2. Have a diagnosis of rheumatoid, inflammatory, neurological or neurodegenerative disease;
3. Received a corticosteroid injection in the previous 6 weeks in the affected region;
4. Have had more than 6 months of work restriction for their current musculoskeletal pain;
5. Acute conditions (Constant and intense pain \[\>5/10\];Severely limited range of motion \[more than 50% in at least 2 directions\]; Obvious lateral shift for low back pain or Unable to bear weight \[for lateral ankle sprain\])