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Individualized Cognitive Effort to Failure Does Not Affect Subsequent Strenuous Physical Performance.

Darías Holgado, Alice Cailleux1, Paolo Ruggeri2

  • 1Institute of Sport Sciences, University of Lausanne, Quartier, UNIL-Centre, Bâtiment Synathlon, Lausanne, SWITZERLAND.

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Summary

Performing a demanding cognitive task before exercise does not impair physical performance. Subjective experiences during cognitive tasks are complex and varied, extending beyond simple mental fatigue.

Keywords:
COGNITIVE LOADPUPIL SIZEPUPILLOMETRYSUBJECTIVE EXPERIENCE

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Area of Science:

  • Sports Science
  • Cognitive Neuroscience
  • Psychophysiology

Background:

  • Previous research suggested cognitive effort before exercise may impair physical performance.
  • Recent findings challenge this effect, indicating a need to re-evaluate underlying mechanisms.
  • Methodological limitations, such as task standardization, require novel approaches.

Purpose of the Study:

  • To investigate the impact of individualized cognitive task difficulty on subsequent physical performance.
  • To explore the dynamics between cognitive effort, subjective states, and physical exertion using psychophysiological measures.
  • To challenge the notion that cognitive tasks universally lead to mental fatigue impacting physical output.

Main Methods:

  • A randomized, within-participant design with 21 recreational athletes.
  • Participants completed a running time to exhaustion test after a demanding cognitive task or documentary.
  • Pupillometry and Temporal Experience Tracing (TET) were used to measure cognitive load and subjective states.

Main Results:

  • Subjective experiences during cognitive tasks form distinct patterns beyond simple mental fatigue.
  • A demanding, individualized cognitive task prior to exercise did not negatively affect physical performance.
  • Pupil size correlated with cognitive load and subjective states; fixation duration decreased with task demand.

Conclusions:

  • The study does not support the hypothesis that demanding cognitive tasks impair strenuous physical performance.
  • Cognitive performance is associated with a rich spectrum of subjective experiences, not solely mental fatigue.
  • A novel methodology was employed to understand the interplay between cognitive and physical performance.