Individual socioeconomic and neighborhood factors predict changes in sports activity during the transition to retirement.

"r code and output for the current manuscript is available as supplementary material online. r code and output for the current manuscript is available as supplementary material online."

"Declarations Ethics approval and consent to participateN/A as the study reports a secondary analysis of publicly available anonymised data (see Availability of Supporting Data statement below). Consent for publicationAll listed authors have reviewed the manuscript and consent to their names being inlcuded in the final publication. Competing interestsThe authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. Competing interests The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest."

"Funding This research received no external funding. The German Ageing Survey Data is funded by the German Federal Ministry for Family Affairs, Senior Citizens, Women and Youth (BMFSFJ). Open Access funding enabled and organized by Projekt DEAL."