ABSTRACT
The recommended amount of physical activity for youth is at least 60 minutes of moderate to vigorous physical activity daily (United States Department of Health and Human Services, 2008) and for older adults 30 minutes of moderate intensity activity on most,60 preferably all, days of the week (Nelson et al., 2007). Factors that influence youth engagement in the recom-
ceived physical competence, prior positive physical activity experiences, body image, fun, and enjoyment65 (Brooks & Magnusson, 2006; Sallis, Prochaska, & Taylor, 2000); spending time with peers and experiencing positive social interaction and support from them (Sirad, Pfeiffer, & Pate, 2006; Wilson et al. 2005); parental support and physically active siblings (Gordon-70 Larsen, McMurray, & Popkin, 2000; Sallis et a1., 2000). Factors influencing older adults’ levels of physical activity include time, energy, self-efficacy, presence of chronic health conditions and disabilities, perceived health benefits from exercise, enjoyment of75 physical activity, interaction during exercise and social support from family and friends as facilitators (Belza et al., 2004; Dergance et a1., 2003).
