The impact of physical fitness, social life, and cognitive functions on work ability in middle-aged and older adults.

"Declarations Conflict of interestThe authors declare no conflicts of interest. Ethical approvalThe study was approved by the IfADo Ethics Committee in October 2015 (approval number: A93-3). Data were collected between 2016 and 2020. Consent to participateThis study complies with the Declaration of Helsinki. No patients were involved. All participants gave their written consent form at the beginning of the study and were informed that they could cease participation at any time. Consent for publicationNot applicable. Conflict of interest The authors declare no conflicts of interest."

"Funding The Dortmund Vital Study is funded by the Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo). J.A.R. was supported by a Doctoral Fellowship from the Spanish Ministry of Economy and Competitiveness (grant # BES-2017–079760) in the scope of the project PSI2016-80377-R, granted to S.B and J.M.R."