Exploring the relationship between baseline physical activity levels and mortality reduction associated with increases in physical activity: a modelling study

摘要

BackgroundIncreasing physical activity (PA) levels among the general adult population of developed nations is important for reducing premature mortality and the burdens of preventable illness. Assessing how effective PA interventions are as health interventions often involves categorising participants as either ‘active’ or ‘sedentary’ after the interventions. A model was developed showing that doing this could significantly misestimate the health effect of PA interventions.