Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/47361
DC FieldValueLanguage
dc.contributor.authorTorres-Peralta, Rafaelen_US
dc.contributor.authorLosa-Reyna, Joséen_US
dc.contributor.authorGonzález-Izal, Miriamen_US
dc.contributor.authorPerez-Suarez, Ismaelen_US
dc.contributor.authorCalle-Herrero, Jaimeen_US
dc.contributor.authorIzquierdo, Mikelen_US
dc.contributor.authorCalbet, Jose A. L.en_US
dc.contributor.otherIzquierdo, Mikel-
dc.contributor.otherCalbet, Jose A-
dc.contributor.otherLosa-Reyna, Jose-
dc.contributor.otherSanchez de Torres-Peralta, Rafael-
dc.date.accessioned2018-11-23T12:56:47Z-
dc.date.available2018-11-23T12:56:47Z-
dc.date.issued2014en_US
dc.identifier.issn1527-0297en_US
dc.identifier.urihttp://hdl.handle.net/10553/47361-
dc.description.abstractThe aim of this study was to determine the influence of severe acute hypoxia on muscle activation during whole body dynamic exercise. Eleven young men performed four incremental cycle ergometer tests to exhaustion breathing normoxic (FIo2=0.21, two tests) or hypoxic gas (FIo2=0.108, two tests). Surface electromyography (EMG) activities of rectus femoris (RF), vastus medialis (VL), vastus lateralis (VL), and biceps femoris (BF) were recorded. The two normoxic and the two hypoxic tests were averaged to reduce EMG variability. Peak Vo2 was 34% lower in hypoxia than in normoxia (p<0.05). The EMG root mean square (RMS) increased with exercise intensity in all muscles (p<0.05), with greater effect in hypoxia than in normoxia in the RF and VM (p<0.05), and a similar trend in VL (p=0.10). At the same relative intensity, the RMS was greater in normoxia than in hypoxia in RF, VL, and BF (p<0.05), with a similar trend in VM (p=0.08). Median frequency increased with exercise intensity (p<0.05), and was higher in hypoxia than in normoxia in VL (p<0.05). Muscle contraction burst duration increased with exercise intensity in VM and VL (p<0.05), without clear effects of FIo2. No significant FIo2 effects on frequency domain indices were observed when compared at the same relative intensity. In conclusion, muscle activation during whole body exercise increases almost linearly with exercise intensity, following a muscle-specific pattern, which is adjusted depending on the FIo2 and the relative intensity of exercise. Both VL and VM are increasingly involved in power output generation with the increase of intensity and the reduction in FIo2.en_US
dc.languageengen_US
dc.publisher1527-0297-
dc.relation.ispartofHigh Altitude Medicine and Biologyen_US
dc.sourceHigh Altitude Medicine & Biology[ISSN 1527-0297],v. 15 (4), p. 472-482en_US
dc.subject241106 Fisiología del ejercicioen_US
dc.subject.otherMean Power Frequency
dc.subject.otherSkeletal-Muscle
dc.subject.otherIntegrated Electromyogram
dc.subject.otherDifferent Cadences
dc.subject.otherKnee Extension
dc.subject.otherRoad Cyclists
dc.subject.otherOxygen-Uptake
dc.subject.otherBlood-Flow
dc.subject.otherFatigue
dc.subject.otherHumans
dc.titleMuscle activation during exercise in severe acute hypoxia: Role of absolute and relative intensityen_US
dc.typeinfo:eu-repo/semantics/Articlees
dc.typeArticlees
dc.identifier.doi10.1089/ham.2014.1027
dc.identifier.scopus84919653825-
dc.identifier.isi000346632500026-
dcterms.isPartOfHigh Altitude Medicine & Biology-
dcterms.sourceHigh Altitude Medicine & Biology[ISSN 1527-0297],v. 15 (4), p. 472-482-
dc.contributor.authorscopusid56431163500-
dc.contributor.authorscopusid56297981500-
dc.contributor.authorscopusid26534133700-
dc.contributor.authorscopusid56056361100-
dc.contributor.authorscopusid56458903600-
dc.contributor.authorscopusid7103111881-
dc.contributor.authorscopusid7004323423-
dc.description.lastpage482-
dc.description.firstpage472-
dc.relation.volume15-
dc.investigacionCiencias de la Saluden_US
dc.type2Artículoen_US
dc.identifier.wosWOS:000346632500026-
dc.contributor.daisngid4392482-
dc.contributor.daisngid4486976-
dc.contributor.daisngid1367229-
dc.contributor.daisngid2738067-
dc.contributor.daisngid5563006-
dc.contributor.daisngid28917-
dc.contributor.daisngid90295-
dc.identifier.investigatorRIDA-4894-2010-
dc.identifier.investigatorRIDH-6693-2015-
dc.identifier.investigatorRIDL-8341-2014-
dc.identifier.investigatorRIDH-8647-2016-
dc.contributor.wosstandardWOS:Torres-Peralta, R
dc.contributor.wosstandardWOS:Losa-Reyna, J
dc.contributor.wosstandardWOS:Gonzalez-Izal, M
dc.contributor.wosstandardWOS:Perez-Suarez, I
dc.contributor.wosstandardWOS:Calle-Herrero, J
dc.contributor.wosstandardWOS:Izquierdo, M
dc.contributor.wosstandardWOS:Calbet, JAL
dc.date.coverdateEnero 2014
dc.identifier.ulpgces
dc.description.sjr0,594
dc.description.jcr1,275
dc.description.sjrqQ1
dc.description.jcrqQ3
dc.description.scieSCIE
item.grantfulltextnone-
item.fulltextSin texto completo-
crisitem.author.deptGIR IUIBS: Rendimiento humano, ejercicio físico y salud-
crisitem.author.deptIU de Investigaciones Biomédicas y Sanitarias-
crisitem.author.deptGIR ECOAQUA: Grupo de Investigación en Acuicultura-
crisitem.author.deptIU de Investigación en Acuicultura Sostenible y Ec-
crisitem.author.deptDepartamento de Biología-
crisitem.author.deptGIR IUIBS: Rendimiento humano, ejercicio físico y salud-
crisitem.author.deptIU de Investigaciones Biomédicas y Sanitarias-
crisitem.author.deptDepartamento de Educación Física-
crisitem.author.orcid0000-0002-0848-4260-
crisitem.author.orcid0000-0003-4297-210X-
crisitem.author.orcid0000-0002-9215-6234-
crisitem.author.parentorgIU de Investigaciones Biomédicas y Sanitarias-
crisitem.author.parentorgIU de Investigación en Acuicultura Sostenible y Ec-
crisitem.author.parentorgIU de Investigaciones Biomédicas y Sanitarias-
crisitem.author.fullNameSanchez De Torres Peralta,Rafael-
crisitem.author.fullNameIzquierdo López, María Soledad-
crisitem.author.fullNameLópez Calbet, José Antonio-
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