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Mental Fatigue Impairs Intermittent Running Performance

Smith, Mitchell R, Marcora, Samuele Maria, Coutts, Aaron J (2015) Mental Fatigue Impairs Intermittent Running Performance. Medicine and science in sports and exercise, 47 (8). pp. 1682-1690. ISSN 1530-0315. (doi:10.1249/MSS.0000000000000592) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:60793)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
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The purpose of the study was to investigate the effects of mental fatigue on intermittent running performance.


Ten male intermittent team sports players performed two identical self-paced, intermittent running protocols. The two trials were separated by 7 d and preceded, in a randomized-counterbalanced order, by 90 min of either emotionally neutral documentaries (control) or the AX-continuous performance test (AX-CPT; mental fatigue). Subjective ratings of fatigue and vigor were measured before and after these treatments, and motivation was recorded before the intermittent running protocol. Velocity, heart rate, oxygen consumption, blood glucose and lactate concentrations, and ratings of perceived exertion (RPE) were measured throughout the 45-min intermittent running protocol. Session RPE was recorded 30 min after the intermittent running protocol.


Subjective ratings of fatigue were higher after the AX-CPT (P = 0.005). This mental fatigue significantly reduced velocity at low intensities (1.28 ± 0.18 m·s vs 1.31 ± 0.17 m·s; P = 0.037), whereas high-intensity running and peak velocities were not significantly affected. Running velocity at all intensities significantly declined over time in both conditions (P < 0.001). Oxygen consumption was significantly lower in the mental fatigue condition (P = 0.007). Other physiological variables, vigor and motivation, were not significantly affected. Ratings of perceived exertion during the intermittent running protocol were not significantly different between conditions despite lower overall velocity in the mental fatigue condition. Session RPE was significantly higher in the mental fatigue condition (P = 0.013).


Mental fatigue impairs intermittent running performance. This negative effect of mental fatigue seems to be mediated by higher perception of effort.

Item Type: Article
DOI/Identification number: 10.1249/MSS.0000000000000592
Divisions: Divisions > Division of Natural Sciences > Sport and Exercise Sciences
Depositing User: Samuele Marcora
Date Deposited: 09 Mar 2017 20:37 UTC
Last Modified: 17 Aug 2022 11:01 UTC
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