Yu, Clare C W Association Between Leisure Time Physical Activity, Cardiopulmonary Fitness, Cardiovascular Risk Factors, and Cardiovascular Workload at Work in Firefighters. [electronic resource] - Safety and health at work Sep 2015 - 192-9 p. digital Publication Type: Journal Article ISSN: 2093-7911 Standard No.: 10.1016/j.shaw.2015.02.004 doi