The R Value at VO2 Max during Maximal Graded Exercise Treadmill Tests of Coronary Artery Diseased and Nondiseased Subjects
Date of Award
Master of Arts
Human Performance and Health Education
Dr. Roger Zabik
Dr. Mary Dawson
Dr. Patricia Frye
Masters Thesis-Open Access
This study examined the R value at VO2 max during maximal graded treadmill exercise tests to determine if it was a reliable indicator of VO2 max and could therefore be used as a test termination criterion. The subjects in this study were 160 coronary artery diseased (CAD) patients and 170 nondiseased individuals. Data were collected from existing stress test records. The R value was also analyzed to determine if proportions of diseased and nondiseased subjects were the same. The time it took 100 CAD patients to reach VO2 max and exhaustion once R rose above 1.00 was also examined.
The findings from this study indicated that (a) the R value was not a reliable predictor of VO2 max between the values of 1.10 and 1.20, (b) the R values of the diseased and nondiseased populations were comparable, and (c) the mean additional time spent on the treadmill past VO2 max was not practically significant.
Williams, Sherry S., "The R Value at VO2 Max during Maximal Graded Exercise Treadmill Tests of Coronary Artery Diseased and Nondiseased Subjects" (1992). Masters Theses. 840.