Gait & posture · 2026
An exploration of the association between knee confidence and knee biomechanics in people with knee osteoarthritis.
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Binnie Tara, Smith Anne, Ng Leo, O'Sullivan Peter, Kent Peter, Davey Paul C, Leadbetter Ryan, Campbell Amity
Аннотация
BACKGROUND: Reduced knee confidence is common in people with knee osteoarthritis and may influence how they engage with physical activity. A lack of confidence may lead an individual to adopt compensatory movement strategies, such as reduced vertical knee loading or movement in the sagittal plane, which may contribute to disability. As such, reduced confidence may be an important treatment target for clinicians working to improve function in people with knee osteoarthritis.
RESEARCH QUESTION: Is there an association between knee confidence and vertical knee loading or sagittal-plane knee movement during tasks of daily living, in individuals with knee osteoarthritis?
METHODS: 51 people with knee osteoarthritis participated in this cross-sectional investigation. Knee confidence was assessed using a single item from the Knee Injury and Osteoarthritis Outcome Score. Sagittal plane knee kinematics and moments, vertical knee force and vertical ground reaction force were output for walking, sit-to-stand, step-up and step-down. Force data were normalised to bodyweight, and knee moments to bodyweight and height. Linear regression was used to estimate the association between confidence and kinematic and kinetic peak measures, and statistical parametric mapping regression analysis was used to estimate the association between confidence and the time-series measures. Participants were also classified into three subgroups based on their walking knee flexion/extension moment (biphasic, flexor, extensor) and multinomial logistic regression was used to estimate the association between confidence and subgroup membership. All models were adjusted for knee pain, sex, and speed of movement.
RESULTS: Knee confidence was not associated with peak or time-series kinematic or kinetic measures during the four tasks. There was no association between confidence and knee moment subgroup.
SIGNIFICANCE: In people with knee osteoarthritis, vertical knee loading and sagittal-plane knee movement are not associated with knee confidence, as measured by a single item commonly used to assess this construct. The lack of association may be explained by the inadequate assessment of confidence, or the individual and task-dependent nature of compensatory movement strategies.
RESEARCH QUESTION: Is there an association between knee confidence and vertical knee loading or sagittal-plane knee movement during tasks of daily living, in individuals with knee osteoarthritis?
METHODS: 51 people with knee osteoarthritis participated in this cross-sectional investigation. Knee confidence was assessed using a single item from the Knee Injury and Osteoarthritis Outcome Score. Sagittal plane knee kinematics and moments, vertical knee force and vertical ground reaction force were output for walking, sit-to-stand, step-up and step-down. Force data were normalised to bodyweight, and knee moments to bodyweight and height. Linear regression was used to estimate the association between confidence and kinematic and kinetic peak measures, and statistical parametric mapping regression analysis was used to estimate the association between confidence and the time-series measures. Participants were also classified into three subgroups based on their walking knee flexion/extension moment (biphasic, flexor, extensor) and multinomial logistic regression was used to estimate the association between confidence and subgroup membership. All models were adjusted for knee pain, sex, and speed of movement.
RESULTS: Knee confidence was not associated with peak or time-series kinematic or kinetic measures during the four tasks. There was no association between confidence and knee moment subgroup.
SIGNIFICANCE: In people with knee osteoarthritis, vertical knee loading and sagittal-plane knee movement are not associated with knee confidence, as measured by a single item commonly used to assess this construct. The lack of association may be explained by the inadequate assessment of confidence, or the individual and task-dependent nature of compensatory movement strategies.