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Research letter
Lowest perceived exertion in the late morning due to effects of the endogenous circadian system

https://doi.org/10.1136/bjsports-2018-099148

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    Footnotes

    • Contributors SST had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. MXH, SAR, AMB, NAC, AWM, NPB, MM, MPB, JSE and SAS contributed substantially in the study design or data acquisition and analyses, drafting the manuscript for intellectual content and approving the final version. All authors take accountability for the integrity of this work.

    • Funding Financial support: R01-HL125893 (SAS), F32-HL131308, National Space Biomedical Research Institute through NCC 9-58 and Medical Research Foundation of Oregon (SST), F32DK107146 (AWM), American Sleep Medicine Foundation (MPB), Ford Foundation (NPB) and Oregon Institute of Occupational Health Sciences and CTSA grant (UL1TR000128).

    • Disclaimer The findings and conclusions of this study are those of the authors and do not necessarily reflect the views of Oregon Health & Science University or the National Institutes of Health.

    • Competing interests None declared.

    • Ethics approval Oregon Health & Science University IRB for human subjects research.

    • Provenance and peer review Not commissioned; internally peer reviewed.