Figure 5. RPE during walking in the follicular and luteal phases. The values are presented as means ± standard deviation (n = 10). Three walking sessions, each lasting 15 min, were completed with 5-min rest between walking sessions. RPE during the second walking session in the luteal phase was significantly higher than that in the follicular phase, as analyzed by the two-way ANOVA for repeated measures. RPE, ratings of perceived exertion. * p < 0.05.