About the Authors

Sarah J. Denton

sarah.denton@ncl.ac.uk

Affiliations Institute for Sport and Physical Activity Research, University of Bedfordshire, Bedford, United Kingdom, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom

Michael I. Trenell

Affiliation Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom

Thomas Plötz

Affiliation School of Computing, Newcastle University, Newcastle upon Tyne, United Kingdom

Louise A. Savory

Affiliation Institute for Sport and Physical Activity Research, University of Bedfordshire, Bedford, United Kingdom

Daniel P. Bailey

Affiliation Institute for Sport and Physical Activity Research, University of Bedfordshire, Bedford, United Kingdom

Catherine J. Kerr

Affiliation Institute for Sport and Physical Activity Research, University of Bedfordshire, Bedford, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the Health And Physical activity in Youth study (the HAPPY study): CJK LAS. Performed the multiple regression and ANCOVA analyses: SJD. Performed the power law analyses for patterns of sedentary time accumulation between cardiorespiratory fitness tertiles: TP. Contributed to the writing of the manuscript: SJD MIT CJK. Checked drafts of the manuscript: DPB LAS TP. Performed the experiments: SJD CJK LAS DPB.