Fig. 3. Force/duration curves compare the amount of force (as a percentage of maximal force) produced by male and female muscles (FCR, AIL, ECU) at different stimulus durations when the stimulus rate was held constant at 30 pulses s^-1. Stimulus durations ranged from 50 to 670 ms. The only significant difference (asterisks) occurred in the FCR, in which the female FCR produced more force than the male in the range of 50 to 300 ms (P<0.05, adjusted with sequential Bonferroni; k=7). Values are means ± s.e.m.