Limitations on the use of a single screening question to measure sedentarybehavior

Objectives. This study explored the limitations of identifying sedentary in dividuals via an existing screening question in a state-based surveillance system. Methods. A national sample (n=7529) of adults, selected by random-digit dia ling between November 1999 and May 2000, responded about participation in l eisure-time physical activity, Results. Of those who initially reported no leisure-time physical activity (25%), 85% were engaging in at least some activity, and 20% were engaging i n enough moderate- or vigorous-intensity activity to meet health-related re commendations. Conclusions. Public health programs that use only 1 screening question to i dentify sedentary behavior may not be able to target physical activity mess ages effectively, especially if physical activity is defined to include a b road range of activities beyond sports.