Discussion
arthritis
ARTHRITIS
Identifying interventions to enhance the physical activity levels of typically inactive individuals with arthritis has important implications for improving their quality of life [Taken together, the findings suggest that in the longer term, CRM strategies comprising incentives and ongoing supportive messaging have the potential to influence MVPA/wk thresholds among typically inactive individuals with arthritis. Notably, relative to the control group, receiving the IncentiveImportantly, the findings from our mixed effect models provide insights into mean change in total mins/wk of MVPA across time and reinforce the positive impact of using CRM-driven supportive messaging to encourage MVPA among individuals with arthritis. Specifically, the mean total minutes of MVPA for individuals receiving the IncentiveOur findings also indicate that socio-cognitive drivers of physical activity can differ by MVPA threshold and across discrete timepoints, suggesting a need to consider developing CRM strategies on timepoint specific profiles. For example, the predictive role of intentions and action planning varied across timepoints for the intermediate MVPA threshold, such that baseline intentions were a significant predictor of participants with arthritis reaching/maintaining ≥45 min/wk of MVPA at 12-months post-baseline, whereas intentions measured at 12 months did not significantly predict meeting this threshold at 24-months post-baseline. Conversely, only action planning measured at 12-months post-baseline predicted this threshold at 24-months post-baseline. One potential explanation for these findings is that intentions to engage in physical activity may become crystalized into well-formed action plans with the passage of time, thus increasing the predictive utility of action planning. After all, action planning involves an individual conceptualizing when and where an intended behavior will be enacted [In terms of anticipated regret, prior research suggests that this construct is predictive of exercise-related behavior in cross-sectional studies [Individuals with arthritis are recommended to work towards the upper ≥150 min/wk MVPA threshold [While the relationship between social connection and physical activity is under researched in the context of arthritis, prior research from community samples suggest a positive association between levels of social connection and physical activity such that those who are more socially isolated are more likely to have lower levels of physical activity [Prior research is mixed on the relationship between gender and physical activity among individuals with arthritis, with some studies suggesting no gender differences and others suggesting physical activity is low among women [