Using compositional data analysis to explore accumulation of sedentary behavior, physical activity and youth health.

"Competing interests This research involves secondary data analysis. The LOOK study received funding from the Commonwealth Education Trust and the Canberra Hospital Clinical Trials Unit. Transform-Us! was supported by a National Health and Medical Research Council (NHMRC) Project Grant (ID: 533815) and a Diabetes Australia Research Trust grant. This research was also supported by the NHMRC Centre of Research Excellence (APP1057608). SJJMV holds a Deakin University PhD Scholarship. NDR is supported by a Future Leader Fellowship from the National Heart Foundation (NHF) of Australia (101895). JAMF is supported by the Spanish Ministry of Science, Innovation and Universities under the project CODAMET (RTI2018-095518-B-C21, 2019‒2021). JS is supported by an NHMRC Leadership Level 2 Fellowship (APP1176885). DWD is supported by an NHMRC Senior Research Fellowship (APP1078360) and the Victorian Government's Operational Infrastructure Support Program. RML is supported by an NHF of Australia Postdoctoral Research Fellowship (102109) and an NHMRC Emerging Leadership Fellowship (APP1175250). LSO is supported by an NHMRC/NHF Postgraduate Fellowship (APP1056551) and an NHMRC Early Career Fellowship (APP1158487). All the support had no involvement in the study design and writing of the manuscript or the decision to submit it for publication. The authors declare that they have no other competing interests."

"Competing interestsThis research involves secondary data analysis. The LOOK study received funding from the Commonwealth Education Trust and the Canberra Hospital Clinical Trials Unit. Transform-Us! was supported by a National Health and Medical Research Council (NHMRC) Project Grant (ID: 533815) and a Diabetes Australia Research Trust grant. This research was also supported by the NHMRC Centre of Research Excellence (APP1057608). SJJMV holds a Deakin University PhD Scholarship. NDR is supported by a Future Leader Fellowship from the National Heart Foundation (NHF) of Australia (101895). JAMF is supported by the Spanish Ministry of Science, Innovation and Universities under the project CODAMET (RTI2018-095518-B-C21, 2019‒2021). JS is supported by an NHMRC Leadership Level 2 Fellowship (APP1176885). DWD is supported by an NHMRC Senior Research Fellowship (APP1078360) and the Victorian Government's Operational Infrastructure Support Program. RML is supported by an NHF of Australia Postdoctoral Research Fellowship (102109) and an NHMRC Emerging Leadership Fellowship (APP1175250). LSO is supported by an NHMRC/NHF Postgraduate Fellowship (APP1056551) and an NHMRC Early Career Fellowship (APP1158487). All the support had no involvement in the study design and writing of the manuscript or the decision to submit it for publication. The authors declare that they have no other competing interests."