None listed
Conditions
Brief summary
Inferior shoulder mobilisation is used for improving range of motion and reducing pain in patients with shoulder disorders. The mechanisms underlying improvements in pain and range of motion are unclear. The primary aim is to investigate the effect of posterior shoulder mobilisation on scapular and shoulder muscle activity, during resisted shoulder elevation in asymptomatic individuals. This is a repeated-measures, cross-over, randomised controlled study. Twenty-five participants will be recruited. The order of interventions will be randomised. Each participant will perform 5 repetitions of resisted shoulder elevation before and after the control and mobilisation (grade +IV posterior shoulder mobilisation, 3 sets, duration of 60-s) conditions. Surface electromyography recorded muscle activity of: upper and lower trapezius; serratus anterior; infraspinatus; middle and posterior deltoids; and latissimus dorsi muscles.
Interventions
Mobilization: The participants’ shoulder will be passively mobilized by an experienced musculoskeletal physiotherapist. The mobilizations will consist of 3 sets of 60 seconds of passive movement, at a rate of 2 Hz, with 30 seconds interval between sets. This dosage (grade +IV, 2 Hz, 3 sets of 60 seconds, with 30 seconds interval between sets) is commonly used in the clinical setting. The mobilization will be performed with the shoulder in abduction greater than 90 degrees, so that the gleno-hume
Mobilization: The participants’ shoulder will be passively mobilized by an experienced musculoskeletal physiotherapist. The mobilizations will consist of 3 sets of 60 seconds of passive movement, at a rate of 2 Hz, with 30 seconds interval between sets. This dosage (grade +IV, 2 Hz, 3 sets of 60 seconds, with 30 seconds interval between sets) is commonly used in the clinical setting. The mobilization will be performed with the shoulder in abduction greater than 90 degrees, so that the gleno-humeral capsule and ligaments are (theoretically) lengthened. This intervention (i.e. mobilization) will be delivered in one session lasting approximately 5 min. That will be followed by a wash-out period lasting for 10 min.
Sponsors
University of Otago
Study design
Allocation
Randomised controlled trial
Intervention model
Crossover
Primary purpose
Treatment
Masking
Blinded (masking used) (Investigator)
Eligibility
Sex/Gender
All
Age
18 Years to 65 Years
Healthy volunteers
Yes
Inclusion criteria
Participants will be included if they present no current neck and shoulder injuries.
Exclusion criteria
None.
Outcome results
None listed