Haanstra, Tsjitske M Increasing physical activity in healthy adults: a meta-analysis. [electronic resource] - British journal of sports medicine Nov 2012 - 998-9 p. digital Publication Type: Journal Article; Meta-Analysis; Review ISSN: 1473-0480 Standard No.: 10.1136/bjsports-2012-091641 doi Subjects--Topical Terms: AdultExercise--physiologyFemaleHealth BehaviorHumansMale