The increasing prevalence of childhood obesity and its concomitant health risks justify widespread efforts toward
prevention. Although both diet and physical activity have been emphasized as appropriate interventions, the current
paper focuses on the role of physical activity in obesity prevention. Children's levels of physical activity are highly
variable, and may be inฏuenced by a multitude of factors including physiological, psychological, sociocultural and
environmental determinants. Although the relationship between physical activity and obesity is controversial and the
protective mechanism unclear, physical activity is hypothesized to protect individuals from the development of
obesity by increasing energy expenditure and resting metabolic rate (RMR) and leading to a favourable fuel utilization.
The beneฎcial effect of physical activity in children is supported by controlled exercise intervention programs. Several
broad-based public health interventions designed to increase children's levels of physical activity have been
implemented in schools, families and communities, with results suggesting promising strategies for the prevention
of childhood obesity. It is likely that successful prevention of childhood obesity through physical activity promotion
will involve theory-based, culturally appropriate school, family and community interventions. Through policy changes,
environmental planning and educational efforts in schools and communities, increased opportunities and encourage-
ment for physical activity can be provided.
The increasing prevalence of childhood obesity and its concomitant health risks justify widespread efforts toward
prevention. Although both diet and physical activity have been emphasized as appropriate interventions, the current
paper focuses on the role of physical activity in obesity prevention. Children's levels of physical activity are highly
variable, and may be inฏuenced by a multitude of factors including physiological, psychological, sociocultural and
environmental determinants. Although the relationship between physical activity and obesity is controversial and the
protective mechanism unclear, physical activity is hypothesized to protect individuals from the development of
obesity by increasing energy expenditure and resting metabolic rate (RMR) and leading to a favourable fuel utilization.
The beneฎcial effect of physical activity in children is supported by controlled exercise intervention programs. Several
broad-based public health interventions designed to increase children's levels of physical activity have been
implemented in schools, families and communities, with results suggesting promising strategies for the prevention
of childhood obesity. It is likely that successful prevention of childhood obesity through physical activity promotion
will involve theory-based, culturally appropriate school, family and community interventions. Through policy changes,
environmental planning and educational efforts in schools and communities, increased opportunities and encourage-
ment for physical activity can be provided.
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