Determining minimum number of valid days for accurate estimation of sedentary behaviour and awake-time movement behaviours using the ActivPAL3 in nursing home residents.

"Declarations Ethics approval and consent to participateApproved by the Ethics and Research Committee of the University of Vic – Central University of Catalonia (reference number 92/2019). Signed informed consent was gained from all the resident or his/her legal guardian and the nursing homes staff members who participate in the project. Consent for publicationNot applicable. Competing interestsThe authors declare that they have no competing interests, and the funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results. Competing interests The authors declare that they have no competing interests, and the funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results."

"Funding This work was supported by the Hestia Chair from Universitat Internacional de Catalunya (grant number BI-CHAISS-2019/003) and the research grant from the Catalan Board of Physiotherapists Code R03/19."