| Primary outcome |
| Cardiorespiratory fitness | Cardiopulmonary Exercise Test (CPET) | X | X | X | |
| Secondary outcomes |
| Functional performance | Short Physical Performance Battery (SPPB) | X | X | X | |
| Muscle Strength | Leg Press 1-RM | X | X | X | |
| Hand grip strength (HGS) | X | X | X | |
| Physical activity | Actigraph GT3X+ accelerometer | X | X | X | |
| Body composition | Anthropometry | X | X | X | |
| Mid arm and waist circumference | X | X | X | |
| Bioimpedance analysis | X | X | X | |
| Dietary intake | Dietary interview | X | X | X | |
| Foodbook24 | X | X | X | |
| Nutrition-related symptoms | Gastrointestinal Symptom Rating Scale (GSRS) | X | X | X | |
| Simplified Nutritional Appetite Questionnaire (SNAQ) | X | X | X | |
| Quality of Life | EORTC-QLQ-C30 | X | X | X | X |
| Cancer specific quality of Life | EORTC-QLQ-OG25 (oesophago-gastric cancer) | X | X | X | X |
| EORTC-QLQ-HCC18 (liver cancer) | X | X | X | X |
| EORTC-QLQ-PAN26 (pancreatic cancer) | X | X | X | X |
| Fatigue | Multidimensional Fatigue Inventory (MFI-20) | X | X | X | |
| Qualitative approach | Semi –structured interviews (focus groups or 1:1) | | X | X | |
| Cost analyses | Clinical salaries, overheads and equipment costs | | | | X |
| Blood samples | Serum, plasma and whole blood | X | X | X | |
| Adherence | Record in case report form/ exercise diary | | X | | |
| Other |
| Sociodemographic details | Participant self-report | X | | | |
| Medical/ Cancer history | Medical records | X | | | |
| Adverse events | Reports of patients/ research personnel | X | X | X | X |
