The DOI matches its Crossref record; 41 of the 41 references it cites were found in a registry or an index.
Hip kinematics and kinetics in persons with and without cam femoroacetabular impingement during a deep squat task
Abstract
Background Previous studies have indicated that hip and pelvis kinematics may be altered during functional tasks in persons with femoroacetabular impingement. The purpose of this study was to compare hip and pelvis kinematics and kinetics during a deep squat task between persons with cam femoroacetabular impingement and pain-free controls.Methods Fifteen persons with cam femoroacetabular impingement and 15 persons without cam femoroacetabular impingement performed a deep squat task. Peak hip flexion, abduction, and internal rotation, and mean hip extensor, adductor, and external rotator moments were quantified. Independent t-tests (α<0.05) were used to evaluate between group differences.Findings Compared to the control group, persons with cam femoroacetabular impingement demonstrated decreased peak hip internal rotation (15.2° (SD 9.5°) vs. 9.4° (SD 7.8°); P=0.041) and decreased mean hip extensor moments (0.56 (SD 0.12) Nm/kg vs. 0.45 (SD 0.15) Nm/kg; P=0.018). In addition persons in the cam femoroacetabular impingement group demonstrated decreased posterior pelvis tilt during squat descent compared to the control group, resulting in a more anteriorly tilted pelvis at the time peak hip flexion (12.5° (SD 17.1°) vs. 23.0° (SD 12.4°); P=0.024).Interpretation The decreased hip internal rotation observed in persons with cam femoroacetabular impingement may be the result of bony impingement. Furthermore, the decrease in posterior pelvis tilt may contribute to impingement by further approximating the femoral head-neck junction with the acetabulum. Additionally, decreased hip extensor moments suggest that diminished hip extensor muscle activity may contribute to decreased posterior pelvis tilt.
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“Clinical guidelines for persons post ACL reconstruction advocate for the restoration of knee extensor strength and symmetry.48,49”
From A Biomechanical Review of the Squat Exercise: Implications for Clinical Practice. (2024) · cites this paper as [49]
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The contour of the femoral head-neck junction as a predictor for the risk of anterior impingement
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Metadata
- Authors
- Bagwell, J. J., Snibbe, J., Gerhardt, M., & Powers, C. M.
- Affiliations
- University of Southern California (US)
- Corresponding author
- Bagwell, Jennifer J.
- Snibbe, Jason
- Gerhardt, Michael
- Powers, Christopher M.
- Venue
- Clinical Biomechanics
- Publisher
- Elsevier BV
- Published
- 2016-01
- Volume
- 31
- Pages
- 87-92
- ISSN
- 0268-0033 (ISSN-L)
- OpenAlex
- W2160784221
- Cited by
- 115
- References
- 41
- Citations by year
- 2026: 10 · 2025: 5 · 2024: 10 · 2023: 9 · 2022: 13 · 2021: 13 · 2020: 10 · 2019: 13 · 2018: 18 · 2017: 13 · 2016: 1
- FWCI
- 10.74
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Clinical Biomechanics (publishedVersion)
- PubMed (publishedVersion)
- Creighton Digital Repository (CDR) (submittedVersion)
- Funders
- International Society of Biomechanics (53-3407-7080)
- California Physical Therapy Fund (13-03)
- Topics
- Health Sciences › Medicine › Surgery › Hip disorders and treatments
- Physical Sciences › Engineering › Biomedical Engineering › Lower Extremity Biomechanics and Pathologies
- Health Sciences › Medicine › Surgery › Orthopaedic implants and arthroplasty
- Keywords
- hip kinematics, hip kinetics, deep squat, hip internal rotation, posterior pelvic tilt, hip extension moment, hip flexion, hip abduction, bony impingement
- MeSH terms
- Acetabulum, Adult, Biomechanical Phenomena, Female, Femur, Hip Joint, Humans, Male, Middle Aged, Rotation, Case-Control Studies, Range of Motion, Articular, Weight-Bearing, Femoracetabular Impingement
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