Journal article
Single-Leg Squat Performance is Impaired 1 to 2 Years After Hip Arthroscopy
PM & R, Vol.8(4), pp.321-330
2016
Abstract
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°, 95% confidence interval [CI] 0.7°-4.8°) and apparent knee valgus (4.0°, 95% CI 1.0°-7.1°) 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°, 95% CI 0.1°-2.3°). Women had significantly greater apparent hip adduction (standing 1.6°, 95% CI 0.5°-2.6° peak squat depth 2.4°, 95% CI 0.3°-4.4°) and apparent knee valgus (standing 3.3°, 95% CI 1.8°-4.7° peak squat depth 3.1°, 95% CI 0°-6.1°). 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. © 2016 American Academy of Physical Medicine and Rehabilitation.
Details
- Title
- Single-Leg Squat Performance is Impaired 1 to 2 Years After Hip Arthroscopy
- Authors
- Paula Charlton (Author) - University of MelbourneA L Bryant (Author) - University of MelbourneJ L Kemp (Author) - Federation University AustraliaRoss Clark (Author) - Australian Catholic UniversityK M Crossley (Author) - University of QueenslandN J Collins (Author) - University of Melbourne
- Publication details
- PM & R, Vol.8(4), pp.321-330
- Publisher
- Elsevier Inc.
- Date published
- 2016
- DOI
- 10.1016/j.pmrj.2015.07.004
- ISSN
- 1934-1482
- Copyright note
- Copyright © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health and Behavioural Sciences - Legacy; School of Health - Public Health
- Language
- English
- Record Identifier
- 99450690902621
- Output Type
- Journal article
Metrics
46 File views/ downloads
272 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- Web Of Science research areas
- Rehabilitation
- Sport Sciences