Article

OBJECTIVE: To evaluate single-leg squat performance 1-2 years after arthroscopy
for intra-articular hip pathology compared with control subjects and the
nonsurgical limb, and to investigate whether single-leg squat performance on the
operated limb was associated with hip muscle strength. DESIGN: Cross-sectional study. SETTING: Private physiotherapy clinic and university laboratory.
PARTICIPANTS: Thirty-four participants (17 women, 36.7 +/- 12.6 years) 1-2 years
after hip arthroscopy and 34 gender-matched control subjects (17 women, 33.1 +/-
11.9 years). METHODS: Participants performed single-leg squats using a
standardized testing procedure. Squat performance was captured using video. Video
footage was uploaded and reformatted for analyses. Hip muscle strength was
measured with handheld dynamometry using reliable methods. OUTCOME MEASURES:
Frontal plane pelvic obliquity, hip adduction, and knee valgus were measured.
Repeated measures analysis of variance evaluated between-group differences, with
limb as a within-subjects factor (surgical versus nonsurgical) and gender as a
between-subjects factor (P < .05). RESULTS:
The hip arthroscopy group
demonstrated significantly greater apparent hip adduction (mean difference 2.7
degrees , 95% confidence interval [CI] 0.7 degrees -4.8 degrees ) and apparent
knee valgus (4.0 degrees , 95% CI 1.0 degrees -7.1 degrees ) at peak squat depth
compared with control subjects. The operated limb also demonstrated significantly
greater pelvic obliquity during single-leg stance compared with the nonsurgical
limb (1.2 degrees , 95% CI 0.1 degrees -2.3 degrees ). Women had significantly
greater apparent hip adduction (standing 1.6 degrees , 95% CI 0.5 degrees -2.6
degrees ; peak squat depth 2.4 degrees , 95% CI 0.3 degrees -4.4 degrees ) and
apparent knee valgus (standing 3.3 degrees , 95% CI 1.8 degrees -4.7 degrees ;
peak squat depth 3.1 degrees , 95% CI 0 degrees -6.1 degrees ). Significant
positive correlations were found between frontal plane angles and hip flexor and
extensor peak torque (P > .05). CONCLUSION: One to 2 years after hip arthroscopy,
deficits in single-leg squat performance exist that have the potential to
increase hip joint impingement and perpetuate postoperative symptoms.
Rehabilitation after hip arthroscopy should target retraining in functional
single-leg positions.
CI - Copyright (c) 2016 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS