“…Since a part of the population of people with ID is historically inclined to obesity and in a poorer health condition -both as a consequence of insuffi cient physical activity and genetic diff erences (Frey & Chow, 2006;Yamaki, 2005; -it had been considered until recently that people with ID, on the periphery of society, should be resting and leading a "passive" life to prevent something worse happening to them (Goff man, 1991;Burnik & Brod, 2006). Consequently, motor defi ciency, which is refl ected in the information and energy components of movement (Filipčič, 2003;Frey & Chow, 2006;Temple et al, 2006), further increases with adolescence (Wall, 2004, in Zhang, 2005.…”