Physical activity interventions in the workplace: the rationale and future direction for workplace wellness.

The developing and developed worlds are both facing an obesity epidemic with their workers getting bigger, or to be more specific, fatter. As demonstrated elsewhere in this issue, the individual and societal health and economic costs of obesity and physical inactivity are enormous. There is thus a need for regional, national and global action to combat the issues, with programmes broadly divisible into children and adolescents, the workforce, active aging, healthy aging and a broad cross-cutting agenda that focuses on the built environment.