Circulation, Vol 83, 1557-1561, Copyright © 1991 by American Heart Association
LS Pescatello, AE Fargo, CN Leach Jr and HH Scherzer
BACKGROUND. To quantify the duration of postexercise hypotension at
different exercise intensities, we studied six unmedicated, mildly
hypertensive men matched with six normotensive controls. METHODS AND
RESULTS. Each subject wore a 24-hour ambulatory blood pressure monitor at
the same time of day for 13 consecutive hours on 3 different days. On each
of the 3 days, subjects either cycled for 30 minutes at 40% or 70% maximum
VO2 or performed activities of daily living. There was no intensity effect
on the postexercise reduction in blood pressure, so blood pressure data
were combined for the different exercise intensities. Postexercise
diastolic blood pressure and mean arterial pressure were lower by 8 +/- 1
(p less than 0.001) and 7 +/- 1 mm Hg (p less than 0.05), respectively,
than the preexercise values for 12.7 hours in the hypertensive group. These
variables were not different before and after exercise in the normotensive
group. Systolic blood pressure was reduced by 5 +/- 1 mm Hg (p less than
0.05) for 8.7 hours after exercise in the hypertensive group. In contrast,
systolic blood pressure was 5 +/- 1 mm Hg (p less than 0.001) higher for
12.7 hours after exercise in the normotensive group. When the blood
pressure response on the exercise days was compared with that on the
nonexercise day, systolic blood pressure (135 +/- 1 versus 145 +/- 1 mm Hg)
and mean arterial pressure (100 +/- 1 versus 106 +/- 1 mm Hg) were lower (p
less than 0.05) on the exercise days in the hypertensive but not in the
normotensive group. We found a postexercise reduction in mean arterial
pressure for 12.7 hours independent of the exercise intensity in the
hypertensive group. Furthermore, mean arterial pressure was lower on
exercise than on nonexercise days in the hypertensive but not in the
normotensive group. CONCLUSION. These findings indicate that dynamic
exercise may be an important adjunct in the treatment of mild hypertension.
ARTICLES
Short-term effect of dynamic exercise on arterial blood pressure
New Britain General Hospital, CT 06050.
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