Fig. 1

\({\dot{V}}_{{\text{O}}_{2}}\), \({\dot{V}}_{{\text{CO}}_{2}}\), \({\dot{V}}_{\text{E}}\), HR, RPE, and Load. The data for each intensity are plotted against %\({\dot{V}}_{{\text{O}}_{\text{2peak}}}\). on the x-axis and each parameter on the y-axis. The plots from left to right show rest, very-light, light, moderate, vigorous, and near maximal/maximal intervals. \({\dot{V}}_{{\text{O}}_{2}}\), oxygen intake; \({\dot{V}}_{{\text{CO}}_{2}}\), carbon dioxide output; \({\dot{V}}_{\text{E}}\), minute ventilation; HR, heart rate; RPE, ratings of perceived exertion. Data are presented as mean. The gray bands represent 95% CI, although some are too small to clearly visualize. The horizontal error bars (95% CI) cannot be visualized as all were smaller than 1.0% \({\dot{V}}_{{\text{O}}_{\text{2peak}}}\)