Rachel K Nelligan* (1), Rana S Hinman (1), Lou Atkins (2), Kim L Bennell (1)
(1) Centre for Health, Exercise and Sports Medicine, Department of Physiotherapy, School of Health Sciences, Melbourne, The University of Melbourne, VIC, Australia
(2) Research Department of Clinical, Education and Health Psychology, Centre for Outcomes Research and Effectiveness, University College London, London, UK
Background: Exercise is a core component of all knee osteoarthritis (OA) clinical practice guidelines. However, long-term exercise adherence is often poor, limiting its capacity to provide long-term symptom relief. To improve exercise outcomes, interventions that facilitate exercise adherence are needed. Short Message System (SMS) show promise in health behaviour change with programs underpinned by theory having larger effects.
Objective: To describe the development of a SMS program to support exercise adherence in people with knee OA applying the Behaviour Change Wheel (BCW).
Methods: The intervention was developed in two phases. Phase one involved using the BCW to select the target behaviour and associated barriers/facilitators/behaviour change techniques (BCTs). Phase 2 involved design of the program functionality and message library. Messages arranged into a 24-week schedule were provided to an external company to develop into an automated SMS program.
Results: The target behaviour was identified as participation in home-based strengthening exercise three times a week for 24-weeks. Thirteen barriers and nine facilitators of the behaviour and 21 BCTs were selected to use in the intervention. 198 messages were developed and organised into a 24-week automated program that functions by prompting users to self-report the number of home exercise sessions completed each week. Users who report ≥3 exercise sessions/week (adherent) receive a positive reinforcement SMS. Users who report <3 exercise session/week (non-adherent) are asked to select a barrier (from a standardised list) that best explains low adherence. This triggers a SMS containing a BCT suggestion relevant to overcoming the selected barrier. Users also receive SMS to facilitate exercise adherence, irrespective of self-reported adherence.
Conclusions: This study demonstrates the BCW can be applied to guide development of an automated SMS intervention to support exercise adherence in knee OA.
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For more information about this abstract, please contact:
Rachel Nelligan, Centre for Health, Exercise and Sports Medicine, The University of Melbourne
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