Full project’s name
The Around the Clock Terminology Consortium: A global consensus on terminology to discuss the 24-hour cycle of physical activity, sedentary behaviour, and sleep
Logo

Website
Under development.
Principal Investigator
Ryan Stanley Falck
The University of British Columbia, Canada
Timeline
9/2/2024 – 7/31/2026
Other participants
Kirk I. Erickson | AdventHealth Research Institute, Neuroscience Institute | United States of America
Ester Cerin | Australian Catholic University-Melbourne Campus & The University of Hong Kong | Australia & China
Liye Zou | Shenzhen University | China
Ashleigh E. Smith | University of South Australia | Australia
Francisco B. Ortega | University of Granada | Spain
Jennifer C. Davis | University of British Columbia-Okangan Campus | Canada
Jasper Schipperijn | University of Southern Denmark | Denmark
Jannique van Uffelen | KU Leuven | Belgium
António Palmeira | Universidade Lusófona & Universidade do Porto | Portugal
Michelle W. Voss | The University of Iowa | United States of America
David W. Dunstan | Deakin University & Baker Heart and Diabetes Institute | Australia
Linda C. Li | The University of British Columbia | Canada
Jairo H. Migueles | University of Granada | Spain
Nucharapon Liangruenrom | Mahidol University | Thailand
Guilherme Moraes Balbim| The University of British Columbia | Canada
Jennifer R. Tomasone | Queen’s University | Canada
Matthew N. Ahmadi | University of Sydney | Australia
Karen Spruyt | Université de Paris | France
Frank Hookin Fu | Hong Kong Baptist University | China
Lora Giangregorio | University of Waterloo | Canada
Zhaowei Kong | University of Macau | China
Sjaan R. Gomersall | The University of Queensland | Australia
Jean-Phillipe Chaput | University of Ottawa | Canada
Miao Miao | Peking University | China
Natan Feter | Federal University of Rio Grande do Sul, School of Medicine | Brazil
Keerthana Swaminathan | Manipal Academy of Higher Education | India
Robert Schinke | Laurentian University | Canada
Yiqun Gan | Peking University |China
Shigeru Inoue | Tokyo Medical University | Japan
Varadayini Gorhe | MindFirst Performance Psychology | India
Takumi Abe | Meiji University | Japan
Maurelle D’Sa | Edge Hill University | United Kingdom
Yu-Kai Chang | National Taiwan Normal University | Taiwan
Amy Shirong Lu | Northeastern University | United States of America
David Lubans | University of Newcastle & University of Jyväskylä | Australia and Finland
Åsa B Tornberg | Lund University | Sweden
Teresa Liu-Ambrose | The University of British Columbia | Canada
Abstract
Physical activity, sedentary behaviour, and sleep occupy the 24-hour cycle and are associated with a multitude of health outcomes. As this field of research rapidly increases, a key question emerges: what should we collectively call these behaviours? In September 2024, we established the Around the Clock Terminology Consortium (ACT-C) – an internationally representative group of researchers and key interest-holder organizations to develop a consensus in terminology for the 24-hour cycle of physical activity, sedentary behaviour, and sleep. We are currently conducting a Delphi consensus project to establish internationally agreed-upon terminology for the 24-hour cycle of physical activity, sedentary behaviour, and sleep, with the aim of improving future research, public health policy, and practice guidelines. Our efforts will assist policymakers, researchers, and practitioners in aligning strategies and recommendations under a unified terminological framework for the 24-hour day.