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Fig. 4. Fractional increases in blood flow (F_dQ) above values for moderate-speed level running due to an increase in speed (hatched bars) or incline (black bars). The digital flexors (sDF-II, sDF-III, latDDF, medDDF) and the femorotibialis muscles (FTLD, FTLP, FTI, and FTM) have been combined into a digital flexor group and femorotibialis group, respectively. Muscles are also grouped into those active during swing and stance (Marsh et al., 2004). The femorotibialis group is assigned both swing and stance phase activity (Marsh et al., 2004). Values are means ± s.e.m. (N=8). *Significant difference (P<0.05) in the F_dQ values resulting from an increase in speed or incline (Wilcoxon nonparametric test). The red bars represent the fractional increases in flow predicted if the increased flow was distributed according to muscle mass. Abbreviations are defined in Table 1.

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