“…For instance, the hedonic treadmill (Diener, Lucas, & Scollon, 2006) emphasises that specific experiences momentarily influence happiness, and that repeated positive events can continue to promote more positive mood states. Recent leisure research suggests that intrinsic motivation in one's leisure predicts more happiness (Carruthers & Hood, 2007;Iso-Ahola & Mannell, 2004 Difficulty People might avoid difficult or challenging SSLAs as they may undermine self-confidence and sense of control (Havitz et al, 2013;Iso-Ahola & Mannell, 2004;Iwasaki & Mannell, 2004). Furthermore, a major barrier with interventions is adherence, with difficulty of related activities as a prime culprit for poor retention rates and by extension less long-term benefits (Bosworth, Powers, & Oddone, 2010).…”