“…In contrast, research examining physical activity and depression in youth is scant with only a small number of population-based studies published to date (Larun, Nordheim, Ekeland, Hagen, & Heian, 2006). Epidemiological studies utilising child and adolescent cohorts have found inverse cross-sectional associations between leisure-time physical activity and depressive symptoms (Goldfield et al, 2011;Prasad, St-Hilaire, Wong, Peterson, & Loftin, 2009;Rothon et al, 2010) and dysthymia (Ströhle et al, 2007), and between sports participation and depressive symptoms (Desha, Ziviani, Nicholson, Martin, & Darnell, 2007). Inverse prospective associations between leisure-time physical activity and risk of depressive symptoms (Motl, Birnbaum, Kubik, & Dishman, 2004), dysthymia (Ströhle et al, 2007), and major depressive disorder (Jerstad, Boutelle, Ness, & Stice, 2010) have also been demonstrated.…”