Hip rotation during standing and dynamic activities and the compensatory effect of femoral anteversion: An in-vivo analysis of asymptomatic young adults using three-dimensional computed tomography models and dual fluoroscopy.
Keisuke Uemura, Penny R Atkins, Niccolo M Fiorentino and 1 others
PMID 29413797WHAT IT FOUND
In 11 young adults without hip pain, standing hip rotation was not zero and related to rotation during walking and pivoting.
Femoral anteversion was related to hip rotation, but that link disappeared when movement was measured from each person's standing position.
Key findings
01Standing hip rotation was strongly related to average hip rotation during walking and to end-range internal and external pivot rotation.
02Femoral anteversion was 15.7°±6.3° and was related to absolute hip rotation during standing and walking, but correlations with rotation during gait were not significant when rotation was measured relative to standing.
03Hip rotation averaged 11.3° during standing, 7.8° during gait, and 7.7° between pivot activities, with standard deviations of 7.3°, 4.7°, and 10.7°.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
Only 11 analysed subjects were included after 7 exclusions, so the findings are limited to a small group of asymptomatic young adults. The study was observational and measured associations, not the effects of therapy, surgery, or other interventions. Only standing, walking, and rotational pivots were tested; it does not describe hip rotation during other daily or clinical activities. Foot position was instructed but not physically enforced, and knee and ankle motion could affect measured hip rotation. Participants received ionizing radiation; the estimated maximum amount was 10.72 mSv.
Declared interests
The supplied text does not include a conflict-of-interest declaration. Publication types list NIH extramural and non-U.S. government research support.
The easy way to misread this
Do not read these findings as evidence that changing femoral anteversion or treating hip rotation will improve function. The study measured 11 asymptomatic young adults and reported associations between anatomy and movement, not an intervention outcome.