Fig. 4. Fractional delta flow in the leg muscles that have significant changes in blood flow in response to (A) trunk or (B) limb loading. Fractional delta flow is the ratio of the change in flow to an individual muscle divided by the total increase in flow to all of the leg muscles combined. The FT is grouped with the stance muscles for trunk loading and swing-phase muscles for limb loading (see text). Abbreviations for muscle names are given in Table 1.