Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/75553
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dc.contributor.authorSkattebo, Øyvinden_US
dc.contributor.authorCapelli, Carloen_US
dc.contributor.authorRud, Bjarneen_US
dc.contributor.authorAuensen, Mariusen_US
dc.contributor.authorCalbet, Jose A.L.en_US
dc.contributor.authorHallén, Josteinen_US
dc.date.accessioned2020-11-16T11:08:28Z-
dc.date.available2020-11-16T11:08:28Z-
dc.date.issued2020en_US
dc.identifier.issn0905-7188en_US
dc.identifier.otherScopus-
dc.identifier.urihttp://hdl.handle.net/10553/75553-
dc.description.abstractWhen exercising with a small muscle mass, the mass-specific O2 delivery exceeds the muscle oxidative capacity resulting in a lower O2 extraction compared with whole-body exercise. We elevated the muscle oxidative capacity and tested its impact on O2 extraction during small muscle mass exercise. Nine individuals conducted six weeks of one-legged knee extension (1L-KE) endurance training. After training, the trained leg (TL) displayed 45% higher citrate synthase and COX-IV protein content in vastus lateralis and 15%-22% higher pulmonary oxygen uptake ((Formula presented.)) and peak power output ((Formula presented.)) during 1L-KE than the control leg (CON; all P <.05). Leg O2 extraction (catheters) and blood flow (ultrasound Doppler) were measured while both legs exercised simultaneously during 2L-KE at the same submaximal power outputs (real-time feedback-controlled). TL displayed higher O2 extraction than CON (main effect: 1.7 ± 1.6% points; P =.010; 40%-83% of (Formula presented.)) with the largest between-leg difference at 83% of (Formula presented.) (O2 extraction: 3.2 ± 2.2% points; arteriovenous O2 difference: 7.1 ± 4.8 mL· L−1; P <.001). At 83% of (Formula presented.), muscle O2 conductance (DMO2; Fick law of diffusion) and the equilibration index Y were higher in TL (P <.01), indicating reduced diffusion limitations. The between-leg difference in O2 extraction correlated with the between-leg ratio of citrate synthase and COX-IV (r =.72-.73; P =.03), but not with the difference in the capillary-to-fiber ratio (P =.965). In conclusion, endurance training improves O2 extraction during small muscle mass exercise by elevating the muscle oxidative capacity and the recruitment of DMO2, especially evident during high-intensity exercise exploiting a larger fraction of the muscle oxidative capacity.en_US
dc.languageengen_US
dc.relation.ispartofScandinavian Journal of Medicine and Science in Sportsen_US
dc.sourceScandinavian Journal of Medicine and Science in Sports[ISSN 0905-7188], v. 30(9), p. 1615-1631, (Septiembre 2020)en_US
dc.subject241106 Fisiología del ejercicioen_US
dc.subject.otherArteriovenous Oxygen Differenceen_US
dc.subject.otherBlood Flowen_US
dc.subject.otherEndurance Trainingen_US
dc.subject.otherFick Methoden_US
dc.subject.otherLimitationsen_US
dc.subject.otherMaximal Oxygen Uptakeen_US
dc.subject.otherMuscle Oxygen Diffusionen_US
dc.subject.otherPeripheral Adaptationsen_US
dc.titleIncreased oxygen extraction and mitochondrial protein expression after small muscle mass endurance trainingen_US
dc.typeinfo:eu-repo/semantics/Articleen_US
dc.typeArticleen_US
dc.identifier.doi10.1111/sms.13707en_US
dc.identifier.scopus85085617755-
dc.contributor.authorscopusid56711333700-
dc.contributor.authorscopusid7004189630-
dc.contributor.authorscopusid25655368200-
dc.contributor.authorscopusid57215724697-
dc.contributor.authorscopusid7004323423-
dc.contributor.authorscopusid26656659300-
dc.identifier.eissn1600-0838-
dc.description.lastpage1631en_US
dc.description.firstpage1615en_US
dc.investigacionCiencias de la Saluden_US
dc.type2Artículoen_US
dc.description.numberofpages22en_US
dc.utils.revisionen_US
dc.identifier.ulpgcen_US
dc.contributor.buulpgcBU-FISen_US
dc.description.sjr1,575
dc.description.jcr4,221
dc.description.sjrqQ1
dc.description.jcrqQ1
dc.description.scieSCIE
item.grantfulltextopen-
item.fulltextCon texto completo-
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.orcid0000-0002-9215-6234-
crisitem.author.parentorgIU de Investigaciones Biomédicas y Sanitarias-
crisitem.author.fullNameLópez Calbet, José Antonio-
Colección:Artículos
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