 No research has been done linking prehabilitation to the incidence of delirium. The research team has extensive experience studying delirium. Decreased cognition and functional ability has been linked to delirium and poorer outcomes post-operatively. Robinson, 2009. 4. Theoretically, by improving functional ability pre-operatively, post-operative outcomes will improve and delirium will decrease. This study will examine if this is true. 