“…At the beginning of the exercise programme, task self-efficacy was the strongest predictor of attendance, although by 12 months, the relationship was small and negative, suggesting that behaviour is no longer dependent on whether one feels capable of performing it. While previous research indicates outcome satisfaction (Neff & King, 1995;Wilcox et al, 2006) and exercise self-efficacy (Blanchard et al, 2002;Larson, McFadden, McHugh, Berry, & Rodgers, 2017;Rodgers et al, 2013) play a role in behavioural maintenance, this is the first study to examine these constructs simultaneously over time. These findings are consistent with previous research that has found confidence for physical tasks important to behaviour during the initial months of exercise programmes (Rodgers et al, 2009(Rodgers et al, , 2013Selzler, Rodgers, Berry, & Stickland, 2016), and confidence for overcoming barriers important to longerterm exercise performance (Blanchard, Rodgers, Courneya, Daub, & Knapik, 2002; Schwarzer & Luszczynska, 2015).…”