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Mental Fatigue Impairs Physical Performance in Young Swimmers
Eduardo Macedo Penna1,2,3, Edson Filho4, Samuel Penna Wanner1
11 Universidade Federal de Minas Gerais.
Pediatric Exercise Science
|December 26, 2017
Summary
Mental fatigue negatively impacts young athletes' swimming speed, slowing performance in a 1500-m time trial. Heart rate variability remained unaffected by mental fatigue induction.
Area of Science:
- Sports Science
- Exercise Physiology
- Psychology
Background:
- Mental fatigue is increasingly recognized as a factor affecting athletic performance.
- Understanding its specific effects on endurance activities like swimming is crucial for training and competition strategies.
Purpose of the Study:
- To examine how induced mental fatigue affects heart rate variability (HRV), subjective fatigue levels, and swimming performance in young athletes.
- To differentiate the impact of mental fatigue from physical exertion on key physiological and performance metrics.
Main Methods:
- Sixteen young swimmers completed a 1500-m time trial under two conditions: after a mental fatigue-inducing Stroop test and after a neutral video control.
- Subjective fatigue, effort, and motivation were assessed, alongside HRV measurements before and after interventions and performance times.
Main Results:
- The Stroop test successfully induced higher subjective mental fatigue and effort compared to the control condition.
- Mental fatigue led to a 1.2% decrease in 1500-m swimming performance (slower times).
- No significant differences were found in heart rate variability or rating of perceived exertion between the two conditions.
Conclusions:
- Mental fatigue impairs swimming performance in young athletes.
- Heart rate variability does not appear to be a reliable indicator of mental fatigue in this context.
- These findings highlight the importance of managing cognitive load in addition to physical training for optimal athletic outcomes.
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