B. Don Franks

Changes in VO2 max Resulting from Bicycle Training at Different Intensities Holding Total Mechanical Work Constant

Abstract Effects of different training intensities on VO2 max were determined. Sixteen male Ss (ages 16–18) were randomly assigned to 1 of 3 training groups or a control group. The training groups trained 3 days/wk on bicycle ergometers at different intensities (85%, 75%, or 65% of HR max) with all groups doing the same total mechanical work (12,000 kpm per training session). Measurement of VO2 at each of the 3 workloads in 2 anthropometrically similar individuals revealed a similar O2 cost needed to accomplish 12,000 kpm of mechanical work. Analysis of covariance revealed a significant difference (p < .01) in VO2 max between the groups. Significant differences (p < .01) were found between both the 85% and 75% groups and the control. No significant differences were found between the 65% group and the control or between the 75% and the 85% group. Within the limitations of the study, it was concluded that when comparing between training intensities while holding mechanical work constant it is necessary to w...