Females with hip-related pain demonstrate reduced kinetics at the hip and ankle during terminal stance of gait.
Madeline Grosklos, Cara L Lewis, Elizabeth Ceballos and 2 others
PMID 37515892WHAT IT FOUND
Females with hip-related pain showed reduced hip and ankle forces during late stance, suggesting whole-limb offloading rather than compensation.
Males showed no such differences. Peak hip moments did not differ between groups, contradicting the hypothesis that pain drives specific joint moment changes.
Key findings
01Females with hip-related pain demonstrated lower peak ankle plantarflexion moments on their involved limb compared to their uninvolved limb.
02Females with hip-related pain demonstrated lower hip flexion angular impulse in the involved limb compared to healthy controls, while males showed no significant differences.
03Contrary to the hypothesis, there were no significant differences in peak internal hip flexion moments between individuals with hip-related pain and healthy controls.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study was a secondary analysis with no prior power calculation, resulting in a small sample size that may lack the sensitivity to detect subtle differences. Participants were recruited from a single orthopaedic clinic and were all scheduled for surgery, which may limit generalizability to patients with hip pain managed conservatively. Analysis was restricted to the sagittal plane during terminal stance, potentially missing compensatory strategies in the frontal or transverse planes or during other phases of gait. It is unclear whether the observed movement patterns caused the pain or developed as a result of it, as the study design cannot establish causality.
Declared interests
The authors declared no conflicts of interest. One author reported a relationship with JOSPT Inc involving board membership. The study was supported by non-U.S. government and NIH extramural funding.
The easy way to misread this
Do not interpret the lack of difference in peak hip moments as evidence that hip kinetics are normal in all patients with hip-related pain. The null finding for peak moments contrasts with significant findings for angular impulse in females, indicating that the timing and duration of force application differ even if peak magnitude does not.