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Mental fatigue significantly impairs physical performance, including repeated sprint ability and jump contact time, in active young adults. Cognitive functions like vigilance also decline, highlighting the broad impact of mental exertion on athletic capabilities.

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cognitive loadmental fatiguepsychomotor vigilancereaction timerepeated jumping abilityrepeated sprint abilitysubjective workload

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Area of Science:

  • Sports Science
  • Cognitive Neuroscience
  • Human Performance

Background:

  • Cognitive fatigue is increasingly recognized for its potential impact on physical performance.
  • Understanding the interplay between mental exertion and athletic capabilities is crucial for training and competition.

Purpose of the Study:

  • To investigate the effects of induced mental fatigue on repeated sprint ability (RSA), neuromuscular performance, and vigilance.
  • To assess whether cognitive fatigue impacts physically active young adults.

Main Methods:

  • 28 physically active young adults were divided into mental fatigue (MF) and control (CON) groups.
  • Participants underwent cognitive tasks followed by physical and cognitive performance assessments.
  • Measures included RSA, countermovement jump, repeated jump ability, and psychomotor vigilance.

Main Results:

  • The MF group showed significant declines in RSA mean and total time, and impaired repeated jump contact time.
  • Vigilance deteriorated in the MF group, with slower reaction times and increased lapses.
  • Subjective ratings indicated higher perceived exertion and mental fatigue in the MF group.

Conclusions:

  • Cognitive fatigue negatively impacts repeated sprint ability and neuromuscular performance in physically active individuals.
  • Mental fatigue also deteriorates cognitive functions such as vigilance.
  • These findings suggest that mental exertion can impair both physical and cognitive performance, even in trained populations.