Occupational sitting exposure is common and contributes a large proportion of overall sedentary exposure for many workers. Excessive sitting is associated with markers of poor health outcomes, but evidence for occupational sitting is less clear. Early evidence suggests occupational interventions targeting sitting reduction can substantially reduce occupational sitting, at least in office workplaces. This report considers issues related to both non-occupational sedentary behaviour and sedentary work. This summary is restricted to:

• scope and definitions
• how harm arises from sedentary work
• what is considered excessive work related exposure, and
• ways to reduce prolonged sitting at work.