ProActIF-01 Trial: Feasibility Study of an Individualized Program of Nutrition and Adapted Physical Activity in Frail Patients With Advanced Digestive Cancers

\- APA intervention: weekly supervised sessions at home with the APA professional combined with unsupervised sessions, alone or with the APA partner, for 8 weeks. The supervised session will be broken down as follows: warm-up block (approximately 10'), aerobic block (15'), muscle strengthening/resistance block (15') and stretching/relaxation block (10'). The remaining 10' will be used to review the session and the individual sessions. This program can be adapted to the needs and abilities of the patient if necessary. \- Nutritional intervention: dietitian weekly visits at home during 8 weeks with dietetic counseling; decision of oral, enteral and/or parenteral feeding validated by the clinical steering committee according to the Société Francophone de Nutrition Clinique et Métabolisme (SFNCM) guidelines.