Effects of a self‐determination theory‐based physical activity programme for postmenopausal women with rheumatoid arthritis: A randomized controlled trial

Abstract Aims The study aimed to develop and evaluate the effects of a self‐determination theory‐based, nurse‐led, physical activity programme for postmenopausal women with rheumatoid arthritis. Methods Between December 2019 and April 2020, this randomized controlled trial recruited 62 postmenopausal women with rheumatoid arthritis from a university‐affiliated hospital in South Korea. The intervention group participated in a self‐determination theory‐based, nurse‐led, physical activity programme that consisted of Tai Chi‐based physical activity, a supportive psychosocial strategy, and interactive counselling for 16 weeks, and the control group continued to undergo their usual care. Results There were statistically significant group‐by‐time interactions in physical activity and perceived sarcopenia, which favoured the intervention group. Additionally, the intervention group showed significant improvements in the perceived therapeutic efficacy of physical activity, grip strength, walking speed, disease activity score, and health‐related quality of life. Conclusions The programme developed in this study can be an effective and feasible approach for postmenopausal women with rheumatoid arthritis in improving physical activity, selected osteosarcopenic outcomes, and health‐related quality of life. Further research is required to investigate the long‐term effects of this theory‐based programme for postmenopausal women in diverse settings.