Prehabilitation to Improve Cancer Surgery Outcomes

This is a randomized control trial aiming to investigate the use of a prehabilitation regimen for patients undergoing major GI cancer surgery and its effects on measurements of HRQOL, LOS, and post-operative complications. Participants will be randomized to either the Prehabilitation arm or the Usual Care arm (control group). The Prehabilitation arm will be prescribed both physical and psychological prehabilitation prior to undergoing surgery for their GI cancer. The Usual Care arm will be counseled to continue their current level of activity and given the information on exercise as outlined in the Cancer Care Ontario guidelines. Participants in the Usual Care arm will also be given the same activity tracker as patients in the Prehabilitation arm in order to eliminate the activity tracker as an intervention itself. Clinical, patient-reported outcomes and health system outcomes will be evaluated. Outcomes will be measured at consent (baseline), immediately preoperatively, and postoperatively at 1, 3 and 6 months. The investigators will collect measures of recruitment, attrition and self-reported compliance via a log completed by the coordinator during weekly patient phone calls.