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The Psychological Benefits of Vigorous Exercise: A Study of Discordant MZ Twin Pairs

Published online by Cambridge University Press:  21 February 2012

Wendy Johnson  and
Robert F. Krueger
Wendy Johnson*
Affiliation:
Department of Psychology, University of Minnesota — Twin Cities, Minneapolis, United States of America. john4350@umn.edu
Robert F. Krueger*
Affiliation:
Department of Psychology, University of Minnesota — Twin Cities, Minneapolis, United States of America. krueg038@umn.edu
*
1Address for correspondence: Wendy Johnson, Department of Psychology, University of Minnesota, 75 East River Road, Minneapolis, MN 55455, USA.
2Address for correspondence: Robert F. Krueger, Department of Psychology, University of Minnesota, 75 East River Road, Minneapolis, MN 55455, USA.

Abstract

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The physiological benefits of vigorous exercise are well established. The existence of psychological benefits is less clear, however, due to methodological limitations common to investigatory studies. Two of these limitations are the difficulty of establishing appropriate control groups and the large variety of highly specific measures of psychological function available for consideration of effects. To address these limitations, we identified 63 pairs of monozygotic twins from the National Survey of Midlife Development in the United States who were discordant for the amount of vigorous exercise in which they engaged regularly. The twins who regularly engaged in vigorous exercise experienced greater positive psychological functioning than their nonexercising co-twins as measured by the latent factor representing the variance common to 8 measures of mood, optimism, control over life, and interpersonal aspects of personality. The magnitude of the difference was in excess of .4 standard deviations.

Type
Guest Editorial
Information
Twin Research and Human Genetics , Volume 10 , Issue 2 , 01 April 2007 , pp. 275 - 283
Copyright
Copyright © Cambridge University Press 2007