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Abstract
Thirty-seven healthy type A men (mean age 42 years) were randomly assigned to either
an aerobic exercise training group or to a strength and flexibility training group.
Before exercise, subjects underwent comprehensive physiologic and behavioral assessments,
including graded exercise treadmill testing with direct measurement of oxygen consumption
(VO2) and measurement of cardiovascular (heart rate, systolic and diastolic blood pressure
and rate pressure product) and neuroendocrine (epinephrine and norepinephrine) responses
to mental arithmetic. The aerobic exercise consisted of walking and jogging at an
intensity of ≥70% maximal heart rate reserve for 1 hour 3 times/ week for 12 consecutive
weeks. The strength training consisted of 1 hour of circuit Nautilus training 2 times/week
for 12 weeks. At the completion of the exercise program, all subjects underwent repeat
testing. For the aerobic group, peak VO2 increased significantly from 33.6 to 38.4 ml/kg/min (p < 0.001), whereas the strength
group only achieved a slight increase from 34.5 to 35.6 ml/kg/min (difference not
significant). During the mental arithmetic, the aerobic group experienced a greater
reduction in levels of heart rate, diastolic blood pressure and rate pressure product
than the strength group (after completing the exercise training programs). The aerobic
group also tended to secrete less epinephrine and to show a faster recovery than the
strength group after the exercise program. In addition, the aerobic group tended to
exhibit less cardiovascular reactivity to mental stress after exercise training. These
data suggest that aerobic exercise reduces levels of cardiovascular and sympathoadrenal
responses during and after mental stress.
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Article info
Publication history
Accepted:
September 5,
1989
Received:
July 5,
1989
Footnotes
☆This study was supported in part by grant HL30675 from the National Heart, Lung, and Blood Institute, Bethesda, Maryland, grant AG04238 from the National Institute on Aging, Bethesda, and a grant from the John D. and Catherine T. MacArthur Foundation on Health and Behavior, Chicago, Illinois.
Identification
Copyright
© 1990 Published by Elsevier Inc.
