| Summary: | The purpose of this study was to identify the most responsive measure of aerobic fitness over a four week pre-surgical aerobic training program (prehabilitation) in patients undergoing major bowel resection. Twenty one subjects (14 in exercise, 7 in control) participated. Fourteen subjects underwent 26.5 +/- 8.6 days of progressive aerobic exercise training at 40 to 65% of heart rate reserve (%HRR). The results showed that peak power output was the only maximal measure that responded to training as it improved by 26 +/- 27% (ES = 0.24, SRM = 1.05) in the exercise group (p < 0.05) compared to no change in the control group. For the submaximal measures, 6-Minute Walking Test improved in both group. Submaximal V·O2 (V·O2submax) and Submaximal Heart Rate (HR submax) were the most responsive to training as they decreased by 13 +/- 15% (ES = -0.24, SRM = -0.57) and 7 +/- 6% (ES = -0.40, SRM = -0.97) at 76 +/- 47 W compared to no change in the control group.
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