 Subjects were studied over 2 sessions. At each session, subjects received either electrical foot stimulation or intermittent pneumatic compression of one foot. The other lower extremity served as a control. Subjects received either therapy at one session and the other therapy at a second session at least 48 hours later. The right or left leg of each subject was randomly assigned as the same control leg for both studies. The type of therapy given at the first session was also randomly assigned. 