Modifying activity behaviours in osteoarthritis

INTERVENTION: People with mild hip or knee osteoarthritis will take part in a behaviour change intervention which will take place over an 8‐week period. During this time, participants will complete 3 motivational interviewing (MI) sessions (weeks 1‐4) and 2 integrated MI‐cognitive behaviour theory (CBT) sessions (weeks 5‐8). Each session will last approximately 30 minutes and will be delivered in a one‐to‐one format. At least 1 of each session may take place in person. The remaining sessions will be delivered through an online video conferencing platform. A researcher who is trained in the MI‐CBT techniques will deliver the intervention. As MI is effective for initiating behaviour change, information will be used to identify possible target areas for change where sedentary behaviour can be swapped for some form of light physical activity. Cognitive behaviour theory will be used to set those goals using self‐generated options on methods to allow participants to reduce their time spent sitting by engaging in activities such as light walking, gardening or light household activities regularly into their day. A session diary will be kept by the researcher containing examples of open‐ended questions and MI techniques for the researcher. The diary will also be used to record notes on participant responses in the session and during the CBT sessions will record targets for behaviour change. Attendance and completion of the number of sessions will be recorded to monitor adherence to the MI‐CBT intervention. CONDITION: Musculoskeletal ‐ Osteoarthritis Osteoarthritis; ; Osteoarthritis Physical Medicine / Rehabilitation ‐ Other physical medicine / rehabilitation Public Health ‐ Health promotion/education PRIMARY OUTCOME: The Hip dysfunction and Osteoarthritis Outcome Score (HOOS) questionnaire will be used to assess hip disability related to the osteoarthritis.[Baseline (pre‐intervention) and 8 weeks after the commencement of the MI‐CBT intervention] The Knee injury and Osteoarthritis Outcome Score (KOOS) questionnaire will be used to assess knee‐related function.; [Baseline (pre‐intervention) and 8 weeks after the commencement of the MI‐CBT intervention] INCLUSION CRITERIA: Men and women will be eligible for inclusion in the study if they have been diagnosed with hip or knee osteoarthritis as per the American Rheumatism Association (ACR) criteria and classified with minimal osteoarthritis (Kellgren‐Lawrence grade less than or equal to 2), are between 40 and 80 years of age, have a body mass index between 20 to 35 kg/m2, and are ambulant with or without assistive devices. SECONDARY OUTCOME: The Behavioural Regulation in Exercise Questionnaire.[Baseline (pre‐intervention) and 8 weeks after the commencement of the MI‐CBT intervention] The Exercise Self‐Efficacy scale.[Baseline (pre‐intervention) and 8 weeks after the commencement of the MI‐CBT intervention] The Fear Avoidance Beliefs Questionnaire[Baseline (pre‐intervention) and every 2 weeks during the 8‐week intervention period] The Numeric Pain Rating Scale [Baseline (pre‐intervention) and every 2 weeks during the 8‐week intervention period] Time spent in light physical activity, objectively measured using a waist‐worn actigraph.[Baseline (pre‐intervention) and every 2 weeks during the 8‐week intervention period] Time spent in moderate to vigorous intensity physical activity, objectively measured using a waist‐worn actigraph. MVPA is a composite secondary outcome.[Baseline (pre‐intervention) and every 2‐weeks during the 8‐week intervention.] Time spent in sedentary behaviour, objectively measured using a thigh‐worn activPAL[Baseline (pre‐intervention) and every 2 weeks during the 8‐week intervention]