The Psychophysiological Regulation of Pacing Behaviour and Performance Fatigability During Long-Distance Running with Locomotor Muscle Fatigue and Exercise-Induced Muscle Damage in Highly Trained Runners

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dc.contributor.authorVenhorst, Andreas
dc.contributor.authorMicklewright, Dominic P
dc.contributor.authorNoakes, Timothy D
dc.date.accessioned2018-07-17T11:08:04Z
dc.date.available2018-07-17T11:08:04Z
dc.date.issued2018-07-10
dc.date.updated2018-07-15T03:27:24Z
dc.description.abstractBackground Locomotor muscle fatigue (LMMF) and exercise-induced muscle damage (EIMD) are common conditions experienced during long-distance running due to the pooled effect of mechanical and metabolic strain on the locomotor muscles. However, little is known about the instant effects of combined LMMF and EIMD on pacing behaviour and performance during the decisive final stages of ‘real-world’ long-distance running events. Methods Twenty-two highly trained runners (11 females) completed two maximal self-paced 20-km treadmill time trials in a counterbalanced crossover design: (A) in a tapered condition and (B) with LMMF and EIMD. Indicators of muscle damage, muscle metabolic strain, and endocrinological stress were assessed to investigate the physiological effects, and a three-dimensional framework of perceived fatigability was applied to investigate the perceptual effects of running with LMMF and EIMD on performance fatigability. Results LMMF and EIMD caused restrictions in work capacity and medium increases in blood leucocyte and neutrophil count, interleukin-6, and cortisol concentrations, collectively constituting a physiological milieu likely not conducive to high performance. LMMF and EIMD further caused large increases in perceived physical strain and large decreases in valence as well as large increases and decreases in action crisis and flow state, respectively. Conclusions Under the constraint of amplified physical duress, findings are suggestive of heuristic and rational antecedents in the goal disengagement process. Dynamic changes in physiological and perceptual effects of LMMF and EIMD are hypothesised to underpin the observed alterations in pacing behaviour and performance fatigability during long-distance running. The applied three-dimensional framework provides a more comprehensive understanding of strain-perception-thinking-action coupling in centrally regulated and goal-directed exercise behaviour.
dc.identifier.apacitationVenhorst, A., Micklewright, D. P., & Noakes, T. D. (2018). The Psychophysiological Regulation of Pacing Behaviour and Performance Fatigability During Long-Distance Running with Locomotor Muscle Fatigue and Exercise-Induced Muscle Damage in Highly Trained Runners. <i>Sports Medicine</i>, http://hdl.handle.net/11427/28309en_ZA
dc.identifier.chicagocitationVenhorst, Andreas, Dominic P Micklewright, and Timothy D Noakes "The Psychophysiological Regulation of Pacing Behaviour and Performance Fatigability During Long-Distance Running with Locomotor Muscle Fatigue and Exercise-Induced Muscle Damage in Highly Trained Runners." <i>Sports Medicine</i> (2018) http://hdl.handle.net/11427/28309en_ZA
dc.identifier.citationVenhorst, A., Micklewright, D. P., & Noakes, T. D. (2018). The Psychophysiological Regulation of Pacing Behaviour and Performance Fatigability During Long-Distance Running with Locomotor Muscle Fatigue and Exercise-Induced Muscle Damage in Highly Trained Runners. Sports medicine-open, 4(1), 29.
dc.identifier.ris TY - Journal Article AU - Venhorst, Andreas AU - Micklewright, Dominic P AU - Noakes, Timothy D AB - Background Locomotor muscle fatigue (LMMF) and exercise-induced muscle damage (EIMD) are common conditions experienced during long-distance running due to the pooled effect of mechanical and metabolic strain on the locomotor muscles. However, little is known about the instant effects of combined LMMF and EIMD on pacing behaviour and performance during the decisive final stages of ‘real-world’ long-distance running events. Methods Twenty-two highly trained runners (11 females) completed two maximal self-paced 20-km treadmill time trials in a counterbalanced crossover design: (A) in a tapered condition and (B) with LMMF and EIMD. Indicators of muscle damage, muscle metabolic strain, and endocrinological stress were assessed to investigate the physiological effects, and a three-dimensional framework of perceived fatigability was applied to investigate the perceptual effects of running with LMMF and EIMD on performance fatigability. Results LMMF and EIMD caused restrictions in work capacity and medium increases in blood leucocyte and neutrophil count, interleukin-6, and cortisol concentrations, collectively constituting a physiological milieu likely not conducive to high performance. LMMF and EIMD further caused large increases in perceived physical strain and large decreases in valence as well as large increases and decreases in action crisis and flow state, respectively. Conclusions Under the constraint of amplified physical duress, findings are suggestive of heuristic and rational antecedents in the goal disengagement process. Dynamic changes in physiological and perceptual effects of LMMF and EIMD are hypothesised to underpin the observed alterations in pacing behaviour and performance fatigability during long-distance running. The applied three-dimensional framework provides a more comprehensive understanding of strain-perception-thinking-action coupling in centrally regulated and goal-directed exercise behaviour. DA - 2018-07-10 DB - OpenUCT DP - University of Cape Town J1 - Sports Medicine LK - https://open.uct.ac.za PB - University of Cape Town PY - 2018 T1 - The Psychophysiological Regulation of Pacing Behaviour and Performance Fatigability During Long-Distance Running with Locomotor Muscle Fatigue and Exercise-Induced Muscle Damage in Highly Trained Runners TI - The Psychophysiological Regulation of Pacing Behaviour and Performance Fatigability During Long-Distance Running with Locomotor Muscle Fatigue and Exercise-Induced Muscle Damage in Highly Trained Runners UR - http://hdl.handle.net/11427/28309 ER - en_ZA
dc.identifier.urihttps://doi.org/10.1186/s40798-018-0143-2
dc.identifier.urihttp://hdl.handle.net/11427/28309
dc.identifier.vancouvercitationVenhorst A, Micklewright DP, Noakes TD. The Psychophysiological Regulation of Pacing Behaviour and Performance Fatigability During Long-Distance Running with Locomotor Muscle Fatigue and Exercise-Induced Muscle Damage in Highly Trained Runners. Sports Medicine. 2018; http://hdl.handle.net/11427/28309.en_ZA
dc.language.isoen
dc.publisherSpringer International Publishing
dc.publisher.departmentMRC/UCT RU for Exercise and Sport Medicineen_ZA
dc.publisher.facultyFaculty of Health Sciencesen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rights.holderThe Author(s).
dc.sourceSports Medicine
dc.source.urihttps://link.springer.com/journal/40279
dc.subject.otherLocomotor muscle fatigue
dc.subject.otherExercise-induced muscle damage
dc.subject.otherPacing behaviour
dc.subject.otherEndurance performance
dc.subject.otherLong-distance running
dc.subject.otherCentral regulation
dc.subject.otherPsychophysiology
dc.subject.otherPerceived fatigability
dc.subject.otherPerformance fatigability
dc.titleThe Psychophysiological Regulation of Pacing Behaviour and Performance Fatigability During Long-Distance Running with Locomotor Muscle Fatigue and Exercise-Induced Muscle Damage in Highly Trained Runners
dc.typeJournal Article
uct.type.filetypeText
uct.type.filetypeImage
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