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Updated: Dec 18, 2025

A Rat Model of Central Fatigue Using a Modified Multiple Platform Method
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Does mental fatigue impair physical performance? A replication study.

Darías Holgado1, Esther Troya1, José C Perales1

  • 1Centro de Investigación, Mente, Cerebro y Comportamiento, Departamento de Psicología Experimental (CIMCYC), Universidad de Granada, Granada, España.

European Journal of Sport Science
|June 11, 2020
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Mental fatigue did not impair physical performance in recreationally active adults, despite successfully inducing subjective mental fatigue. Further research is needed to explore potential influences on exercise and sport performance.

Keywords:
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Area of Science:

  • Exercise Physiology
  • Cognitive Neuroscience
  • Sports Science

Background:

  • The relationship between mental fatigue and physical performance is complex and debated.
  • Previous research suggests mental fatigue may negatively impact endurance and strength.
  • Understanding this interaction is crucial for optimizing athletic training and competition.

Purpose of the Study:

  • To investigate the hypothesis that mental fatigue impairs physical performance.
  • To replicate previous findings in a controlled, within-subjects design.
  • To quantify the effects of a mental fatigue task on exercise capacity.

Main Methods:

  • A pre-registered, within-subjects experiment involving 30 recreationally active adults.
  • Participants completed a time-to-exhaustion test at 80% VO2max after a 90-minute mental fatigue task or a control (documentary).
  • Measurements included power output, heart rate, rating of perceived exertion (RPE), and subjective mental fatigue.

Main Results:

  • The mental fatigue task significantly increased subjective mental fatigue compared to the control (BF01 = 0.009).
  • Moderate-to-strong evidence supported the null hypothesis, indicating no significant reduction in time to exhaustion (BF01 = 9.762).
  • Anecdotal evidence also supported the null hypothesis for rating of perceived exertion and heart rate.

Conclusions:

  • Subjective mental fatigue can be induced without a corresponding decrease in physical performance.
  • The findings challenge the direct causal link between mental fatigue and impaired exercise capacity in this population.
  • Further research should explore moderating factors, such as task individualization, to fully understand mental fatigue's role in performance.