title: Hip joint biomechanics during gait in people with and without symptomatic femoroacetabular impingement.
abstract: Femoroacetabular impingement (FAI) is a morphological hip condition that can cause hip/groin pain and impaired function in younger active adults, and may lead to stiffness, muscle weakness, structural damage, and hip osteoarthritis. Understanding the impairments associated with FAI is crucial to guide treatment and rehabilitation strategies. Evidence is limited and conflicting about whether hip biomechanics are impaired during walking in people with symptomatic FAI. The objective of this study was to determine whether kinematics and kinetics during gait differ between people with symptomatic FAI and control participants. Fifteen participants diagnosed with symptomatic cam-type or combined (cam plus pincer) FAI who were scheduled for arthroscopic surgery and 14 age-, and sex-matched disease-free controls underwent three-dimensional gait analysis. Tri-planar hip kinematics and kinetics were compared between the two groups. There were limited significant between-group differences with respect to spatiotemporal variables. Participants with FAI walked with less range of motion in the sagittal plane during a gait cycle, but did not exhibit any significant kinematic differences in the frontal or transverse planes. There were no systematic differences in kinetics between the groups in any plane. Findings suggest that individuals with symptomatic FAI have minimal impairments in gait biomechanics. Although these individuals demonstrate reduced hip joint motion in the sagittal plane, the size of the difference is small and its significance for symptoms and function is unclear. More pronounced deficits in hip kinetics and kinematics may be evident during functional tasks that challenge the hip towards the position of impingement.
authors.affiliation: The University of Melbourne, Centre for Health, Exercise and Sports Medicine, Department of Physiotherapy, School of Health Sciences, 161 Barry Street, Parkville, VIC 3010, Australia. Electronic address: lauraem@student.unimelb.edu.au.
authors.forename: Laura E
authors.initials: LE
authors.lastname: Diamond
authors.affiliation: The University of Melbourne, Centre for Health, Exercise and Sports Medicine, Department of Physiotherapy, School of Health Sciences, 161 Barry Street, Parkville, VIC 3010, Australia.
authors.forename: Tim V
authors.initials: TV
authors.lastname: Wrigley
authors.affiliation: The University of Melbourne, Centre for Health, Exercise and Sports Medicine, Department of Physiotherapy, School of Health Sciences, 161 Barry Street, Parkville, VIC 3010, Australia.
authors.forename: Kim L
authors.initials: KL
authors.lastname: Bennell
authors.affiliation: The University of Melbourne, Centre for Health, Exercise and Sports Medicine, Department of Physiotherapy, School of Health Sciences, 161 Barry Street, Parkville, VIC 3010, Australia.
authors.forename: Rana S
authors.initials: RS
authors.lastname: Hinman
authors.affiliation: St Vincent's Hospital, East Melbourne, Australia.
authors.forename: John
authors.initials: J
authors.lastname: O'Donnell
authors.affiliation: The University of Queensland, Centre of Clinical Research Excellence in Spinal Pain, Injury and Health, School of Health & Rehabilitation Sciences, St. Lucia, QLD 4072, Australia.
authors.forename: Paul W
authors.initials: PW
authors.lastname: Hodges
mesh_terms: D000293:Adolescent; D000328:Adult; D001696:Biomechanical Phenomena; D005260:Female; D057925:Femoracetabular Impingement / Q000503:physiopathology*; D005684:Gait / Q000502:physiology*; D006621:Hip Joint / Q000503:physiopathology*; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D016059:Range of Motion, Articular / Q000502:physiology*; D016138:Walking / Q000502:physiology*; D055815:Young Adult
keywords: Biomechanics; Femoroacetabular impingement (FAI); Gait; Hip; Range of motion