AUTHOR=Chmelova Irina , Pastucha Dalibor , Hudecek Tomas , Guran Zdenek , Ciecotkova Sona , Martínek Lubomír , Zubikova Jana , Matlova Alena , Dolezel Jakub , Salounova Dana , Chmelo Jakub TITLE=Prehabilitation during neoadjuvant therapy in patients with cancer of the upper gastrointestinal tract and rectum—the study protocol JOURNAL=Frontiers in Sports and Active Living VOLUME=6 YEAR=2025 URL=https://www.frontiersin.org/journals/sports-and-active-living/articles/10.3389/fspor.2024.1495398 DOI=10.3389/fspor.2024.1495398 ISSN=2624-9367