PREPARE-M 2024 Undergoing Major Surgery: a Pilot Interventional

Study plan to conduct a pilot interventional study to evaluate the impact of a prehabilitation program on physical function and clinical outcomes. The prehabilitation program will include preoperative physiotherapy assessment, nutrition education, exercise instructions, and inspiratory muscle training for patients with MIP\<100 cmH2O. Currently, Singapore General Hospital offers the "Prehabilitation for Elderly Frail Patients Undergoing Elective Surgeries (PREPARE)" program, targeting frail patients undergoing major surgery. The primary outcome of the study is the change in physical function, measured by handgrip strength (HGS), from baseline to 3 days before surgery. Secondary outcomes include changes in the 6-minute walk test (6MWT), maximal inspiratory pressure (MIP), and sit-to-stand (STS) parameters from baseline to 3 days before surgery and 4-5 weeks postoperatively. Additionally, study will also assess postoperative complications (using the Comprehensive Complication Index), postoperative morbidity (using the Postoperative Morbidity Survey), length of hospital stay (LOS), and Health-Related Quality of Life (HRQoL) outcomes.