Fig. 4. Concentration of (A) ATP and (B) adenylate pool in adductor muscle of different experimental groups of smaller (open circles, N=4–10) and bigger (filled circles, N=8–12) individuals. No significant differences between groups were found but overall ATP concentration and adenylate pool of bigger individuals was significantly lower than those of smaller individuals. JMP statistic two-way ANOVA P<0.05 for age and >0.05 for group and age x group effect.