Näytä suppeat kuvailutiedot

dc.contributor.advisorAvela, Janne
dc.contributor.advisorKumpulainen, Susanne
dc.contributor.authorRuggiero, Luca
dc.date.accessioned2015-05-25T07:18:16Z
dc.date.available2015-05-25T07:18:16Z
dc.date.issued2015
dc.identifier.otheroai:jykdok.linneanet.fi:1474162
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/46013
dc.description.abstractThe current study was designed to investigate the contribution of neural factors to postactivation potentiation (PAP). Neuromuscular function (i.e. twitches, H-reflexes, motor evoked potentials, and voluntary isometric ballistic contractions) of 8 power-trained (POW) and 8 endurance-trained (END) athletes was recorded before and after a 8-second maximal isometric conditioning contraction (CC) to induce PAP, to elucidate discriminating neural factors in exploiting PAP that might arise from the former training background compared to the latter. After CC, twitch peak force and rate of force development were significantly increased, with higher potentiation in POW (29 ± 11% and 64 ± 24%) than END (8 ± 12% and 34 ± 20%). Among evoked potentials, only motor evoked potentials were short-term facilitated (127 ± 111% and 93 ± 89%, for END and POW respectively), similarly between groups. No differences were reported in ballistic performance (P ≥ 0.069), whose neural drive was significantly depressed in POW at 1 and 2 minutes post-CC, respectively compared to END and to baseline (19 ± 11%). PAP was characterized from enhanced muscle contractile characteristics as well as short-term facilitation of corticospinal excitability, whose individual contribution to performance enhancement could not be quantified. However, when POW were compared to END, the former group benefited from PAP in triceps surae muscles only in terms of higher potentiation of muscular contractile characteristics, as neural pathways were affected likewise from CC. In addition, neural drive of ballistic performance, if affected, might be depressed in POW rather than enhanced, presumably due to neural fatigue from CC. Differences between groups in exploiting PAP in ballistic actions might be therefore primarily related to muscular potentiating mechanisms, although only non-significant potentiation (p-value close to the significance threshold) was found in ballistic performance in our experiments.en
dc.format.extent1 verkkoaineisto (115 sivua)
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.rightsThis publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.en
dc.rightsJulkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.fi
dc.subject.otherPostactivation potentiation
dc.subject.othersupramaximal twitches
dc.subject.othercorticospinal excitability
dc.subject.otherballistic performance
dc.subject.otherneural drive.
dc.titleNeural contribution to postactivation potentiation
dc.identifier.urnURN:NBN:fi:jyu-201505251973
dc.type.ontasotPro gradu -tutkielmafi
dc.type.ontasotMaster’s thesisen
dc.contributor.tiedekuntaLiikuntatieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Sport and Health Sciencesen
dc.contributor.laitosLiikuntabiologian laitosfi
dc.contributor.laitosDepartment of Biology of Physical Activityen
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.oppiaineBiomekaniikkafi
dc.contributor.oppiaineBiomechanicsen
dc.date.updated2015-05-25T07:18:17Z
dc.rights.accesslevelopenAccessfi
dc.type.publicationmasterThesis
dc.contributor.oppiainekoodi5012
dc.subject.ysohermosto
dc.subject.ysoaivokuori
dc.subject.ysosuorituskyky
dc.format.contentfulltext
dc.type.okmG2


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