Objective: The study investigates the impact of preoperative rehabilitation on the surgical prognosis of frail older patients. Method: The effect sizes of all studies retrieved and included by the nine databases were analyzed and expressed as RR and WMD. Results: 8 studies with 902 participants met the criteria for inclusion. A significant reduction in total complications (RR = 0.84, 95 % CI = 0.73 to 0.97, P = 0.021) and the 6MWT after surgery (WMD = 74.76, 95 % CI = 44.75 to 104.77, P = 0.000) was observed in the prehabilitation group. But it had no differences in mortality(RR = 1.89, 95 % C...
