Fig. 2. Effect of a combination of moderate and high intensity exercise on muscle lactate levels during and after exercise. Lactate levels were determined as described in the Materials and methods. M and H refer to values found immediately following moderate and high intensity exercise, respectively. The values are shown as means ± S.E.M. (N=9). a,b above the bars indicate statistical differences: the same letter indicates no significant differences between the values; different letters indicate that the values differ significantly; no letter indicates that this value differs significantly from all others (ANOVA followed by Fisher PLSD a posteriori test; P<0.05).