The communications framework provides guidance for the UK and devolved government administrations on how to communicate the UK Chief Medical Officers’ physical activity guidelines to key professionals and practitioners who are required to know, understand and apply the guidelines in practice. The framework also recognises the role of system enablers - those who can support policy and infrastructure developments that enable the guidelines to be implemented. The framework covers: situational and stakeholder analysis; development of communications aims and messaging; identification of communication channels; and implementation and measures. The framework aims to support communications to stakeholders within and outside the health sector, and professionals and practitioners from: healthcare (GPs, nursing, midwives, health visitors); social care (social workers, care workers); education sector (head teachers, teachers, early years workers); and physical activity sector (fitness instructors, personal trainers, sports coaches).