Footnotes

• Contributors AC-B contributed to conception, design and supervision of the study, participated in data collection and acquisition, performed the statistical analyses, interpreted the data and wrote the report. AC-B is the guarantor and accepts full responsibility for the work.

• Funding This PhD was supported by the Spanish Ministry of Education and Vocational Training, through a grant provided to AC-B. (FPU16/01093); the University of Granada-LoMonaco S.L. Sleep Research Cathedra; the University of Granada Plan Propio de Investigación 2016 –Excellence actions: Unit of Excellence on Exercise and Health (UCEES); and the Junta de Andalucía, Consejería de Conocimiento, Investigación y Universidades (European Regional Development Funds, SOMM17/6107/UGR).

• Competing interests None declared.

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

• Supplemental material This content has been supplied by the author(s). It has not been vetted by BMJ Publishing Group Limited (BMJ) and may not have been peer-reviewed. Any opinions or recommendations discussed are solely those of the author(s) and are not endorsed by BMJ. BMJ disclaims all liability and responsibility arising from any reliance placed on the content. Where the content includes any translated material, BMJ does not warrant the accuracy and reliability of the translations (including but not limited to local regulations, clinical guidelines, terminology, drug names and drug dosages), and is not responsible for any error and/or omissions arising from translation and adaptation or otherwise.