Exercise is more than medicine: The working age population's well-being and productivity.

Background: Physical activity (PA) includes muscle activity during exercise, manual work, and leisure time activities including sport. Conflicting results exist regarding health effects of PA that may deteriorate with manual work and elite sports, but improve when performed in moderation in accordance with international guidelines and may additionally enhance well-being and productivity.

Methods: In Denmark 15 randomized controlled trials have been conducted, introducing exercise at the workplace enrolling >3500 workers.