Examining the Effects of the AgingPLUS Program on Physical Activity: A Multiple Mediator Model

This study examined the effect of the AgingPLUS program on anticipated physical activity (PA) and PA engagement, along with the hypothesized mediator roles of self-efficacy (SE) and exercise intention (EI). Data came from 147 participants (Mage = 60.11 years; SD = 8.28 years) of the ongoing trial. Structural equation modeling tested the effects of the intervention, week 4 EI, and week 4 SE on anticipated PA at week 8 and engagement in PA at 6 months. The pathway from week 8 anticipated PA to month 6 PA was also assessed. Results showed that week 4 SE significantly mediated the pathway of intervention condition to week 8 anticipated PA, whereas week 4 EI significantly mediated the pathway from intervention condition to engagement in PA at 6 months. Furthermore, anticipated PA predicted subsequent engagement in PA. Results from these analyses provide preliminary support for the efficacy of the AgingPLUS program.