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Personality, effort perception and cardiovascular reactivity.

R E De Meersman¹

¹Applied Physiology Laboratory, Teachers' College, Columbia University, New York, N.Y.

Neuropsychobiology

|January 1, 1988

Summary

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Type A individuals underestimate physical exertion compared to Type B. This underestimation may link Type A behavior to increased coronary heart disease risk.

Area of Science:

Cardiology
Psychophysiology
Neuroendocrinology

Background:

Type A behavior pattern is linked to increased coronary heart disease.
The mechanisms underlying this association require further elucidation.
Neuroendocrine and perceptual responses to stress may play a role.

Purpose of the Study:

To investigate differences in perceived exertion and neuroendocrine reactivity between Type A and Type B students.
To explore the potential role of these factors in the Type A-coronary heart disease relationship.

Main Methods:

Student volunteers categorized as Type A or Type B were subjected to a standardized physical stressor (cycle ergometry).
Ratings of perceived exertion were recorded.
Neuroendocrine reactivity was assessed by measuring plasma catecholamines.

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Main Results:

Type A students reported significantly lower ratings of perceived exertion compared to Type B students.
No significant differences in neuroendocrine reactivity (plasma catecholamines) were reported between the groups.
A significant interaction between Type A/B behavior and perceived exertion was observed.

Conclusions:

Type A individuals tend to underestimate physical exertion.
This underestimation represents a potential neuropsychobiological mechanism linking Type A behavior to the development of coronary heart disease.
Further research is warranted to explore the implications of altered perception in cardiovascular health.