Most people would probably benefit from increasing their physical activity. One way to achieve this might be reducing the amount of time we spend sitting down at work. In January 2015, a new Cochrane Review examined the evidence on interventions that might help and this was updated with several new studies in March 2016. We asked one of the authors, Jos Verbeek from the Finnish Institute of Occupational Health to tell us about the need for the review and its latest findings.