A Trial of Preoperative CHO Drinks on Postoperative Walking Capacity in Colorectal Surgery

This prospective randomized controlled study is designed to investigate whether preoperative oral carbohydrate loading improves postoperative walking performance, a surrogate indicator for overall functional recovery, in patients undergoing colorectal surgery as measured by 2-minute and 6-minute walk test. The secondary outcomes are postoperative insulin resistance measured with plasma insulin and glucose concentrations. The tertiary outcomes are duration of hospital stay, patients satisfaction during staying in the hospital and morbidity measured as postoperative complications.