Early Years Accelerometry

The SADEY (Sleep and Activity Database for the Early Years) project will contribute to transforming the lives' of children and populations internationally by creating the first harmonised database of young children's physical activity, sedentary behaviour and sleep.

This project plans to utilise this database to address several questions of global importance to public health policy and practice, including:

  • How much do young children move, sit and sleep across the globe and does this differ across countries?
  • How much do these individual behaviours or their mix across the 24-hour day impact healthy growth and development?

This project is funded by an Australian Research Council Discovery Grant (ARC - DP200102008).


The team

SADEY Co-Lead investigators:

  • Associate Professor Dylan Cliff, Senior Lecturer, School of Education, Faculty of the Arts, Social Sciences and Humanities (Australasia, early childhood accelerometry)
  • Prof Ian Janssen, Professor and Canada Research Chair in Physical Activity and Obesity, School of Kinesiology and Health Studies, Queen's University, Canada (North America, physical activity and sedentary behaviour)

SADEY Project Manager:

  • Devan Antczak, Associate Research Fellow, School of Education, Faculty of the Arts, Social Sciences and Humanities (Australasia, sleep, physical activity and sedentary behaviour)

External partners:

  • Janette Green, Principal Research Fellow, Centre for Applied Statistics in Health, Australian Health Services Research Institute (AHSRI) (Database management)
  • ​Dr Catherine Draper, Associate Professor, MRC/Wits Developmental Pathways for Health Research Unit, University of the Witwatersrand , South Africa (Africa, physical activity and sedentary behaviour)
  • Prof Diego Augusto Santos Silva, Associate Professor, Sports Center, Federal University of Santa Catarina, Brazil (South America, epidemiology of physical activity and sedentary behaviour)
  • Prof Fan Jiang, Professor of Pediatrics, Department of Developmental & Behaviroal Pediatrics, Shanghai Children’s Medical Centre, China (Asia, sleep)
  • Prof Tim Olds, Professor, School of Health Sciences, University of South Australia, Australia (Australasia, sleep)
  • Prof Mark Tremblay, Professor Children’s Hospital of Eastern Ontario Research Institute, Canada (senior advisor, international collaboration)
  • Dr Esther van Sluijs, Programme Leader - Behavioural Epidemiology, MRC Epidemiology Unit, University of Cambridge, UK (UK, Accelerometer database expertise, physical activity and sedentary behaviour)
  • Dr Rute Santos, Professorial Researcher, University of Porto & Portuguese Ministry of Health, Portugal (Europe, physical activity and sedentary behaviour)

Key Documents

 To contact the SADEY team, please email sadey-project@uow.edu.au.



This project is working towards the UN Sustainable Development Goals:

Goal 4: Quality Education .  Goal 17: Partnerships for the Goals