Prehabilitation during neoadjuvant therapy in patients with cancer of the upper gastrointestinal tract and rectum—the study protocol - Chmelova, Irina; Pastucha, Dalibor; Hudecek, Tomas; Guran, Zdenek; Ciecotkova, Sona; Martínek, Lubomír; Zubikova, Jana; Matlova, Alena; Dolezel, Jakub; Salounova, Dana; Chmelo, Jakub (Frontiers in Sports and Active Living, 2025)