How active are we? Levels of routine physical activity in children and adults

摘要: The accurate measurement of physical activity is fraught with problems in adults, but more especially children because they have complex and multi-dimensional patterns. In addition, the results different studies are often difficult to interpret compare, diversity methodological approaches, differences data analysis reporting, adoption varying definitions what constitutes an appropriate level activity. Furthermore, inactivity seldom quantified directly. Although there exists extensive literature documenting health benefits regular activity-health relationships not clear-cut. Current recommendations reinforce concept health-related activity, accumulating 30 min moderate-intensity exercise on at least 5 d/week (adults) 1 h exercise/d (children). Evidence suggests a high prevalence whether or increasing cannot be assessed currently. Similarly, no definite conclusions justified about either levels children, these sufficient maintain promote health. Data support belief that childhood track into adulthood weak. Inactivity associated increased risk weight gain obesity, causality remains established. strong evidence demonstrate dose response relationship between incidence obesity time spent viewing television. Future research should focus refining methodology for assessment make it sensitive dimensions contexts age-groups.