A Pilot Study of the Effect of High Protein Supplement and Exercise Therapy on Preservation of Skeletal Muscle Mass and Quality of Life in Patients With Gastric Cancer and Pancreatic Cancer Treated With Chemotherapy

Inclusion Criteria: 1. Has provided signed written informed Consent 2. Has a histologically confirmed gastric or pancreatic cancer 3. Has a patient scheduled for chemotherapy - Patients who are scheduled to be treated with TS-1 or Xelox for gastric cancer-adjuvant chemotherapy - Patients scheduled for primary chemotherapy for pancreatic cancer-progressive/transitional diseases Exclusion Criteria: 1. Age under 19 or over 90 year of age 2. Eastern Cooperative Oncology Group (ECOG) ≥ 2 3. Patients with severe malnutritional evaluation (PG-SGAC) 4. Any of the following within 3 months prior to study recruitment: myocardial infarction, severe/unstable angina, coronary/peripheral artery bypass graft, NYHA class III or IV congestive heart failure, stroke or transient ischemic attack. 5. A person with previous uncontrolled seizures, central nervous system or psychological disorders 6. Have uncontrolled active infection or sepsis 7. Have deep vein thrombosis occurs within 4 weeks prior to the start of test recruitment 8. Severe acute or chronic conditions that may reduce the patient's ability to participate in clinical trials or make it difficult to interpret clinical trial results 9. Pregnant or lactating women. Pregnancy test results are positive in childbearing women 10. Gastrointestinal obstruction, malabsorption syndrome, or diseases that significantly affect digestive functions