The World Health Organization (WHO) has labelled human obesity a world-wide epidemic (Giskes, van, Avendano-Pabon, & Brug, 2011; Pimentel, Arimura, de Moura, Silva, & de Sousa, 2010). In the last couple of decades, America alone has seen prevalence rates of obesity almost double from 12.8% to 22.5% (Kuczmarski, Flegal, Campbell, & Johnson, 1994; Mokdad et al., 1999). It is now common...