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dc.contributor.authorSemmler, J.en
dc.date.issued2014en
dc.identifier.citationActa Physiologica, 2014; 210(4):754-767en
dc.identifier.issn1748-1708en
dc.identifier.issn1748-1716en
dc.identifier.urihttp://hdl.handle.net/2440/85547-
dc.description.abstractIt is well known that unaccustomed eccentric exercise leads to muscle damage and soreness, which can produce long-lasting effects on muscle function. How this muscle damage influences muscle activation is poorly understood. The purpose of this brief review is to highlight the effect of eccentric exercise on the activation of muscle by the nervous system, by examining the change in motor unit activity obtained from surface electromyography (EMG) and intramuscular recordings. Previous research shows that eccentric exercise produces unusual changes in the EMG–force relation that influences motor performance during isometric, shortening and lengthening muscle contractions and during fatiguing tasks. When examining the effect of eccentric exercise at the single motor unit level, there are substantial changes in recruitment thresholds, discharge rates, motor unit conduction velocities and synchronization, which can last for up to 1 week after eccentric exercise. Examining the time course of these changes suggests that the increased submaximal EMG after eccentric exercise most likely occurs through a decrease in motor unit conduction velocity and an increase in motor unit activity related to antagonist muscle coactivation and low-frequency fatigue. Furthermore, there is a commonly held view that eccentric exercise produces preferential damage to high-threshold motor units, but the evidence for this in humans is limited. Further research is needed to establish whether there is preferential damage to high-threshold motor units after eccentric exercise in humans, preferably by linking changes in motor unit activity with estimates of motor unit size using selective intramuscular recording techniques.en
dc.description.statementofresponsibilityJ. G. Semmleren
dc.language.isoenen
dc.publisherBlackwell Publishingen
dc.rights© 2014 Scandinavian Physiological Societyen
dc.subjectEccentric exercise; electromyography; muscle damage; single motor uniten
dc.titleMotor unit activity after eccentric exercise and muscle damage in humansen
dc.typeJournal articleen
dc.identifier.rmid0020137532en
dc.identifier.doi10.1111/apha.12232en
dc.identifier.pubid14782-
pubs.library.collectionPhysiology publicationsen
pubs.library.teamDS01en
pubs.verification-statusVerifieden
pubs.publication-statusPublisheden
Appears in Collections:Physiology publications

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