Leisure-time physical activity dose‑response effects on obesity among US adults: results from the 1999–2006 National Health and Nutrition Examination Survey

BackgroundIt is not well established whether total volume of leisure-time physical activity (LTPA) has dose‑response effects on obesity.MethodsThe dose‑response relationship was examined using 12 227 non-institutionalised individuals, aged 20‑64 years, drawn from the 8 years (1999–2006) of the continuous National Health and Nutrition Examination Survey (NHANES), a nationally representative sample of the US population.ResultsThe age-adjusted prevalence of women's obesity was 41.4% for those with no LTPA in the past month; 39.1% for those who engaged in LTPA but fell short of the recommended minimum amount of LTPA (ie,