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Eccentric hip abductor weakness in patients with symptomatic external snapping hip.
J S Jacobsen1, K Thorborg, K Søballe
1Department of Physiotherapy and Occupational Therapy, Aarhus University Hospital, Aarhus, Denmark. julie_svj@hotmail.com
Scandinavian Journal of Medicine & Science in Sports
|September 13, 2012
Summary
Patients with external snapping hip demonstrate significantly weaker eccentric hip abduction strength compared to healthy individuals. This finding suggests a link between gluteal weakness and this common hip condition.
Area of Science:
- Orthopedics
- Sports Medicine
- Biomechanics
Background:
- External snapping hip is a common condition impacting physical function in young adults (15-40 years).
- Previous research suggests a potential association between gluteal weakness and external snapping hip syndrome.
Purpose of the Study:
- To investigate eccentric hip abduction strength in individuals with external snapping hip compared to healthy controls.
- To evaluate isometric strength (hip abduction, adduction, extension, flexion, internal/external rotation) in both groups.
Main Methods:
- Cross-sectional study comparing 13 patients with external snapping hip to 13 age- and sex-matched healthy controls.
- Eccentric and isometric muscle strength assessed using a handheld dynamometer with validated protocols.
- Strength measurements included hip abduction, adduction, extension, flexion, and rotation.
Main Results:
- Eccentric hip abduction strength was 16% lower in the external snapping hip group (1.50 ± 0.47 Nm/kg) versus controls (1.82 ± 0.48 Nm/kg, P=0.01).
- No significant differences were found in isometric strength measures between the groups (P > 0.05).
Conclusions:
- Symptomatic external snapping hip is associated with eccentric hip abductor weakness.
- This finding supports the hypothesis linking gluteal weakness to the pathophysiology of external snapping hip.
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