Fig. 4. Relative changes in glycogen content in small (open symbols) and large (filled symbols) dark levator fibers during a contraction-recovery cycle. Values at each time point have been normalized to the mean resting value to allow direct comparison between the size classes (absolute resting values are in Table 3). The arrow indicates when burst contractile exercise was stimulated. The asterisk indicates values significantly different from the resting value. N10 for every point.