Influence of affective stimuli on leg power output and associated neuromuscular parameters during repeated high intensity cycling exercises

dc.contributor.authorJaafar, Hamdien_ZA
dc.contributor.authorRouis, Majdien_ZA
dc.contributor.authorCoudrat, Laureen_ZA
dc.contributor.authorGélat, Thierryen_ZA
dc.contributor.authorNoakes, Tim Den_ZA
dc.contributor.authorDriss, Taraken_ZA
dc.date.accessioned2015-11-18T07:10:43Z
dc.date.available2015-11-18T07:10:43Z
dc.date.issued2015en_ZA
dc.description.abstractThe aim of this study was to examine the impact of emotional eliciting pictures on neuromuscular performance during repetitive supramaximal cycling exercises (RSE). In a randomized order, twelve male participants were asked to perform five 6-s cycle sprints (interspaced by 24 s of recovery) on a cycle ergometer in front of neutral, pleasant or unpleasant pictures. During each RSE, mean power output (MPO) and electromyographic activity [root mean square (RMS) and median frequency (MF)] of the vastus lateralis and vastus medialis muscles were analyzed. Neuromuscular efficiency (NME) was calculated as the ratio of MPO to RMS. Higher RMS (232.17 ± 1.17 vs . 201.90 ± 0.47 μV) and MF (68.56 ± 1.78 vs . 64.18 ± 2.17 Hz) were obtained in pleasant compared to unpleasant conditions (p < 0.05). This emotional effect persisted from the first to the last sprint. Higher MPO was obtained in pleasant than in unpleasant conditions (690.65 ± 38.23 vs . 656.73 ± 35.95 W, p < 0.05). However, this emotional effect on MPO was observed only for the two first sprints. NME decreased from the third sprint (p < 0.05), which indicated the occurrence of peripheral fatigue after the two first sprints. These results suggested that, compared with unpleasant pictures, pleasant ones increased the neuromuscular performance during RSE. Moreover, the disappearance of the beneficial effect of pleasant emotion on mechanical output from the third sprint appears to be due to peripheral fatigue.en_ZA
dc.identifier.apacitationJaafar, H., Rouis, M., Coudrat, L., Gélat, T., Noakes, T. D., & Driss, T. (2015). Influence of affective stimuli on leg power output and associated neuromuscular parameters during repeated high intensity cycling exercises. <i>PLoS One</i>, http://hdl.handle.net/11427/15139en_ZA
dc.identifier.chicagocitationJaafar, Hamdi, Majdi Rouis, Laure Coudrat, Thierry Gélat, Tim D Noakes, and Tarak Driss "Influence of affective stimuli on leg power output and associated neuromuscular parameters during repeated high intensity cycling exercises." <i>PLoS One</i> (2015) http://hdl.handle.net/11427/15139en_ZA
dc.identifier.citationJaafar, H., Rouis, M., Coudrat, L., Gélat, T., Noakes, T. D., & Driss, T. (2015). Influence of affective stimuli on leg power output and associated neuromuscular parameters during repeated high intensity cycling exercises. PloS one, 10(8), e0136330. doi:10.1371/journal.pone.0136330en_ZA
dc.identifier.ris TY - Journal Article AU - Jaafar, Hamdi AU - Rouis, Majdi AU - Coudrat, Laure AU - Gélat, Thierry AU - Noakes, Tim D AU - Driss, Tarak AB - The aim of this study was to examine the impact of emotional eliciting pictures on neuromuscular performance during repetitive supramaximal cycling exercises (RSE). In a randomized order, twelve male participants were asked to perform five 6-s cycle sprints (interspaced by 24 s of recovery) on a cycle ergometer in front of neutral, pleasant or unpleasant pictures. During each RSE, mean power output (MPO) and electromyographic activity [root mean square (RMS) and median frequency (MF)] of the vastus lateralis and vastus medialis muscles were analyzed. Neuromuscular efficiency (NME) was calculated as the ratio of MPO to RMS. Higher RMS (232.17 ± 1.17 vs . 201.90 ± 0.47 μV) and MF (68.56 ± 1.78 vs . 64.18 ± 2.17 Hz) were obtained in pleasant compared to unpleasant conditions (p < 0.05). This emotional effect persisted from the first to the last sprint. Higher MPO was obtained in pleasant than in unpleasant conditions (690.65 ± 38.23 vs . 656.73 ± 35.95 W, p < 0.05). However, this emotional effect on MPO was observed only for the two first sprints. NME decreased from the third sprint (p < 0.05), which indicated the occurrence of peripheral fatigue after the two first sprints. These results suggested that, compared with unpleasant pictures, pleasant ones increased the neuromuscular performance during RSE. Moreover, the disappearance of the beneficial effect of pleasant emotion on mechanical output from the third sprint appears to be due to peripheral fatigue. DA - 2015 DB - OpenUCT DO - 10.1371/journal.pone.0136330 DP - University of Cape Town J1 - PLoS One LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - Influence of affective stimuli on leg power output and associated neuromuscular parameters during repeated high intensity cycling exercises TI - Influence of affective stimuli on leg power output and associated neuromuscular parameters during repeated high intensity cycling exercises UR - http://hdl.handle.net/11427/15139 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/15139
dc.identifier.urihttp://dx.doi.org/10.1371/journal.pone.0136330
dc.identifier.vancouvercitationJaafar H, Rouis M, Coudrat L, Gélat T, Noakes TD, Driss T. Influence of affective stimuli on leg power output and associated neuromuscular parameters during repeated high intensity cycling exercises. PLoS One. 2015; http://hdl.handle.net/11427/15139.en_ZA
dc.language.isoengen_ZA
dc.publisherPublic Library of Scienceen_ZA
dc.publisher.departmentDepartment of Human Biologyen_ZA
dc.publisher.facultyFaculty of Health Sciencesen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en_ZA
dc.rights.holder© 2015 Jaafar et alen_ZA
dc.rights.urihttp://creativecommons.org/licenses/by/4.0en_ZA
dc.sourcePLoS Oneen_ZA
dc.source.urihttp://journals.plos.org/plosoneen_ZA
dc.subject.otherElectromyographyen_ZA
dc.subject.otherEmotionsen_ZA
dc.subject.otherFatigueen_ZA
dc.subject.otherSkeletal musclesen_ZA
dc.subject.otherMuscle contractionen_ZA
dc.subject.otherEnginesen_ZA
dc.subject.otherHuman performanceen_ZA
dc.subject.otherNervous system physiologyen_ZA
dc.titleInfluence of affective stimuli on leg power output and associated neuromuscular parameters during repeated high intensity cycling exercisesen_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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