Healthy
Conditions
Keywords
Spine, mobilization
Brief summary
Previous studies have shown that peripheral muscles weakness or inhibition is related to spinal disorders. Passive mobilization and manipulation are likely to reverse such muscle weakness for patients with spinal pain. The purpose of the study was to assess the effect of spinal mobilization on the maximal muscle strength of the shoulders.
Detailed description
Participants without existing neck pain or shoulder problem will be recruited. Subjects will be screened by 2 investigators independently for shoulder muscle weakness. Weakness is determined by the strength of the other side when one side is remarkably weaker or by comparing with the general strength of the deltoid muscle if both sides are suspected involved. Suitable participants will undergo shoulder strength testing with a handheld dynamometer. Participants will be divided into the intervention group and the control group randomly. The shoulder strength will be tested by the second, individual blinded assessor. Subjects in the intervention group will receive passive spinal mobilization at cervical 4-5 segment on the involved side(s); the control group will receive placebo intervention. Each participant will be tested for 2 times, before and immediately after a C4-5 joint mobilization on the involved side (s).
Interventions
BEHAVIORALPassive mobilization
An anterior-posterior manual pressure act on the cervical spine of the subject
OTHERPlacebo
The elbows will be put into a 90 deg elevated position and held for 5 secs, then back to resting position
Sponsors
The Hong Kong Polytechnic University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
SINGLE (Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* Healthy adults
Exclusion criteria
* People with active neck or should pain
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Deltoid muscle strength (dynamometer) | 10 minutes after the intervention | Immediate measure after the intervention by dynamometer |
| Electromyography (EMG) (signal from deltoid muscle) | 10 minutes after the intervention | The EMG measure on the signal from deltoid muscle immediately after intervention |
Countries
Hong Kong
Outcome results
None listed