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Journal of Applied Physiology, Vol 63, Issue 6 2499-2501, Copyright © 1987 by American Physiological Society
ARTICLES |
M. J. Buono, J. E. Yeager and A. A. Sucec
San Diego State Heart Institute, Department of Biology, California.
The purpose of this study was to reexamine the effect of training on plasma adrenocorticotropin (ACTH) levels during exercise. Ten adult volunteers were split into a control and an experimental group. The experimental group participated in a 12-wk training program that resulted in a significant 11% increase in their mean maximal O2 uptake. The plasma ACTH response to a 150-W work rate was measured in both groups before and after the training program. The experimental group demonstrated a significant reduction in the ACTH response (11 vs. 4 pg/ml) to the work rate, whereas the control group demonstrated an unchanged response (16 vs. 13 pg/ml) over the course of the study. These data suggest that the ACTH response to an absolute submaximal work rate is blunted after training.
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