The objective of this proof of concept study was to explore whether some total hip arthroplasty (THA) patients with well-functioning implants achieve normal sagittal plane hip kinematics during walking gait. Sagittal plane hip kinematics were recorded in eleven people with well-functioning THA (71 ± 8 years, Oxford Hip Score = 46 ± 3) and ten healthy controls (61 ± 5 years) using a three-dimensional motion capture system as they walked over-ground at a self-selected velocity. THA patients were classified as high- or low-functioning (HF and LF, respectively) depending on whether the mean absolute difference between their sagittal plane hip kinematics was within one standard deviation of the control group (5.4°) or not. Hedge's g effect size was used to compare the magnitude of the difference from the control group for the HF and LF THA groups.Abstract
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The objective of this study was to determine the kinematic factor(s) underlying the reduction in walking velocity displayed by total hip arthroplasty (THA) patients in comparison to healthy controls during walking gait. Eleven patients with well-functioning THA (71 ± 8 years, Oxford Hip Score = 46 ± 3) and ten healthy controls (61 ± 5 years) participated within this study. Sagittal plane lower limb kinematics were captured using a 10 camera Qualisys motion capture system, sampling at 200Hz, as participants walked overground at a self-selected pace. Bivariate linear regression was used to explore the relationship between walking velocity and a number of kinematic variables in a deterministic manner. Kinematic variables significantly associated with walking velocity were compared between THA and healthy groups utilising independent samples t-tests.Abstract
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