Just saw this as an interesting article and a potentially a result I was not fully expecting. As expected the researchers found decreased strength in the hip abductors when measuring with a handhold dynamomter which could be do to various reasons as they point out in the article including pain (although 2/3 reported no pain during testing), atrophy, and reduced neuro activation. Surprisingly the researchers did find INCREASED cross sectional area of the gluteal muscles in those with Chronic hip pain (ages 18-40). It’s easy to presume that the CSA would be smaller such as studies found in hip OA. The researchers were not able to ascertain on why the gluteal muscles were actually larger and it may be due to increased fatty muscle infiltrate. They were unable to determine based on the MRI used. Looking forward to the next round of research and larger studies (only 30 participants).
Secondary analysis, cross-sectional study.
Chronic hip joint pain (CHJP) can lead to limitations in activity participation, but the musculoskeletal factors associated with the condition are relatively unknown. Understanding the factors associated with CHJP may help develop rehabilitation strategies to improve quality of life of individuals with long-term hip pain.
To compare measures of hip abductor muscle volume and hip abductor muscle strength between women with CHJP and asymptomatic controls.
Thirty women, 15 with CHJP and 15 matched asymptomatic controls (18-40 years of age), participated in this study. Magnetic resonance imaging was used to determine the volume of the primary hip abductor muscles, consisting of gluteus medius (GMed), gluteus minimus (GMin), a small portion of gluteus maximus (GMax), and tensor fascia latae (TFL), within a defined region of interest. Break tests were performed using a handheld dynamometer to assess hip abductor strength. During the strength test, the participant was positioned in sidelying with the involved hip in 15° abduction. Independent-sample t tests were used to compare muscle volume and strength values between those with CHJP and asymptomatic controls.
Compared to asymptomatic controls, women with CHJP demonstrated significantly increased gluteal muscle volume (228±40cm3 versus 199±29cm3; p=.032), but decreased hip abductor strength (74.6±16.8Nm versus 93.6±20.2Nm; p=.009). There were no significant differences in TFL muscle volume between the two groups (p=.640).
Women with CHJP appear to have larger gluteal muscles, but decreased hip abductor strength compared to asymptomatic controls. J Orthop Sports Phys Ther, Epub 9 Oct 2017. doi:10.2519/jospt.2017.7380
If you would like your blog featured share it to our homepage at myptcorner.com