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Related Experiment Videos

Aerobic exercise and the placebo effect: a controlled study

R Desharnais1, J Jobin, C Côté

  • 1Laboratoire des sciences de l'activité physique, Hôpital Laval, Québec, Canada.

Psychosomatic Medicine
|March 1, 1993
PubMed
Summary
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Exercise may boost psychological well-being through a placebo effect. A 10-week program showed self-esteem improved only when participants expected psychological benefits, not just fitness gains.

Area of Science:

  • Psychology
  • Exercise Science
  • Sports Medicine

Background:

  • The connection between exercise and psychological well-being is well-established.
  • The role of placebo effects in exercise interventions remains under-explored.

Purpose of the Study:

  • To investigate the potential placebo effect in the exercise-psychological enhancement relationship.
  • To determine if perceived psychological benefits influence self-esteem changes during exercise.

Main Methods:

  • 48 healthy adults participated in a 10-week supervised exercise program.
  • An expectancy manipulation procedure was used: one group was told the program targeted psychological well-being, while the control group received no such information.
  • Measures included expectations for benefits, aerobic capacity (VO2max), and self-esteem at various intervals.

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Main Results:

  • Both groups showed similar significant improvements in aerobic capacity.
  • Self-esteem significantly increased over time in the experimental group but not in the control group.
  • Expectations for psychological benefits were linked to self-esteem improvements.

Conclusions:

  • The findings suggest that the placebo effect, driven by expectations of psychological benefits, plays a significant role in how exercise enhances psychological well-being.
  • Exercise prescription may benefit from incorporating psychological expectancy manipulations to maximize self-esteem improvements.