Fig. 3. Dynamic changes in post caval flow (_PC; ml min^–1 kg^–1) during treadmill exercise and during the first 10 min of recovery. _PC increases during treadmill exercise; however, there was no correlation between treadmill speed and magnitude of the _PC change. Maximal _PC was achieved 20 s after the onset of exercise at 0.75 km h^–1, and 40 s after the onset at both 1.0 and 1.5 km h^–1 (paired Dunnett's test). _PC was still significantly elevated (relative to rest) during the 10th minute after all treadmill speeds. Data presented are means ± S.E.M. for 10 s intervals (N=5). Open symbols represent rest; black symbols represent exercise; grey symbols represent recovery from exercise.