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Fig. 2. Force/frequency curves compare the amount of force (as a percentage of
maximal force) produced at varying stimulus rates for male and female muscles
(FCR, AIL, ECU) over a train duration of 670 ms. Stimulus frequencies ranged
from 5 to 80 pulses s-1. No significant differences were found
between sexes for a given muscle. Values are means ± s.e.m. Sample
sizes for these and subsequent figures comparing male and female muscles are
shown in Table 1.