Fig. 4.

The average time course physiological responses [rBF, $\mathrm{\Delta }[\mathrm{Hb}{\mathrm{O}}_2]$, $\mathrm{\Delta }[\mathrm{Hb}]$, arterial blood pressure (ABP) and heart rate] to ES over 10 subjects measured from the stimulated muscles in the right legs with ES at 2 Hz (a), 10 Hz (b), and 50 Hz (c). Data obtained from 10 subjects were aligned based on the marks (vertical lines) made at the beginning and end of ES.