Negative accumulated oxygen deficit during heavy and very heavy intensity cycle ergometry in humans

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dc.contributor.authorRossiter, H.B.
dc.contributor.authorWard, S. A.
dc.contributor.authorWhipp, B. J.
dc.contributor.buuauthorÖzyener, Fadıl
dc.contributor.departmentUludağ Üniversitesi/Tıp Fakültesi/Fizyoloji Anabilm Dalı.tr_TR
dc.contributor.orcid0000-0002-4606-6596tr_TR
dc.contributor.researcheridAAH-1641-2021tr_TR
dc.contributor.scopusid6506242143tr_TR
dc.date.accessioned2022-03-11T06:28:45Z
dc.date.available2022-03-11T06:28:45Z
dc.date.issued2003-09
dc.description.abstractThe concept of the accumulated O-2 deficit (AOD) assumes that the O-2 deficit increases monotonically with increasing work rate (WR), to plateau at the maximum AOD, and is based on linear extrapolation of the relationship between measured steady-state oxygen uptake ((V) over dot O-2) and WR for moderate exercise. However, for high WRs, the measured (V) over dot O-2 increases above that expected from such linear extrapolation, reflecting the superimposition of a 'slow component' on the fundamental (V) over dot O-2 mono-exponential kinetics. We were therefore interested in determining the effect of the (V) over dot O-2 slow component on the computed AOD. Ten subjects [31 (12) years] performed square-wave cycle ergometry of moderate (40%, 60%, 80% and 90% theta(L)) heavy (40%Delta), very heavy (80%Delta) and severe (110% (V) over dot O-2peak) intensities for 10-15 min, where (theta) over capL is the estimated lactate threshold and Delta is the WR difference between (theta) over cap (L) and (V) over dot O-2peak. (V) over dot O-2 was determined breath-by-breath. Projected 'steady-state' (V) over dot O-2 values were determined from sub-(theta) over capL tests. The measured (V) over dot O-2 exceeded the projected value after similar to3 min for both heavy and very heavy intensity exercise. This led to the AOD actually becoming negative. Thus, for heavy exercise, while the AOD was positive [0.63 (0.41) l] at 5 min, it was negative by 10 min [-0.61 (1.05) l], and more so by 15 min [-1.70 (1.64) l]. For the very heavy WRs, the AOD was [0.42 (0.67) l] by 5 min and reached -2.68 (2.09) l at exhaustion. For severe exercise, however, the AOD at exhaustion was positive in each case: +1.69 (0.39) l. We therefore conclude that the assumptions underlying the computation of the AOD are invalid for heavy and very heavy cycle ergometry (at least). Physiological inferences, such as the 'anaerobic work capacity', are therefore prone to misinterpretation.en_US
dc.identifier.citationÖzyener, F. vd. (2003). “Negative accumulated oxygen deficit during heavy and very heavy intensity cycle ergometry in humans”. European Journal of Applied Physiology , 90(1-2), 185-190.en_US
dc.identifier.endpage190tr_TR
dc.identifier.issn1439-6319
dc.identifier.issue1-2tr_TR
dc.identifier.pubmed14504952tr_TR
dc.identifier.scopus2-s2.0-0242467686tr_TR
dc.identifier.startpage185tr_TR
dc.identifier.urihttps://doi.org/10.1007/s00421-003-0870-y
dc.identifier.urihttps://link.springer.com/article/10.1007/s00421-003-0870-y
dc.identifier.urihttp://hdl.handle.net/11452/24939
dc.identifier.volume90tr_TR
dc.identifier.wos000185457700027tr_TR
dc.indexed.pubmedPubmeden_US
dc.indexed.scopusScopusen_US
dc.indexed.wosSCIEen_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.collaborationYurt dışıtr_TR
dc.relation.journalEuropean Journal of Applied Physiologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergitr_TR
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAccumulated oxygen deficiten_US
dc.subjectFatigueen_US
dc.subjectLactate thresholden_US
dc.subjectOxygen requirementen_US
dc.subjectOxygen uptakeen_US
dc.subjectVO2 slow componenten_US
dc.subjectUptake kineticsen_US
dc.subjectO-2 deficiten_US
dc.subjectExerciseen_US
dc.subjectOnseten_US
dc.subjectTransientsen_US
dc.subjectModerateen_US
dc.subjectPhysiologyen_US
dc.subjectSport sciencesen_US
dc.subject.emtreeLactic aciden_US
dc.subject.emtreeAdulten_US
dc.subject.emtreeAnaerobic thresholden_US
dc.subject.emtreeArticleen_US
dc.subject.emtreeBicycle ergometryen_US
dc.subject.emtreeBreathingen_US
dc.subject.emtreeCalculationen_US
dc.subject.emtreeControlled studyen_US
dc.subject.emtreeExhaustionen_US
dc.subject.emtreeHumanen_US
dc.subject.emtreeHuman experimenten_US
dc.subject.emtreeHypoxiaen_US
dc.subject.emtreeMaleen_US
dc.subject.emtreeNormal humanen_US
dc.subject.emtreeOxygen consumptionen_US
dc.subject.emtreePriority journalen_US
dc.subject.emtreeSteady stateen_US
dc.subject.emtreeWork capacityen_US
dc.subject.emtreeWorkloaden_US
dc.subject.meshAdulten_US
dc.subject.meshAnaerobic thresholden_US
dc.subject.meshEnergy metabolismen_US
dc.subject.meshEnergy transferen_US
dc.subject.meshErgometryen_US
dc.subject.meshExerciseen_US
dc.subject.meshExercise toleranceen_US
dc.subject.meshExertionen_US
dc.subject.meshHumansen_US
dc.subject.meshMaleen_US
dc.subject.meshMiddle ageden_US
dc.subject.meshModels, biologicalen_US
dc.subject.meshMuscle fatigueen_US
dc.subject.meshOxygenen_US
dc.subject.meshOxygen consumptionen_US
dc.subject.meshPhysical enduranceen_US
dc.subject.scopusVanadium Dioxide; Ergometers; Deoxygenationen_US
dc.subject.wosPhysiologyen_US
dc.subject.wosSport sciencesen_US
dc.titleNegative accumulated oxygen deficit during heavy and very heavy intensity cycle ergometry in humansen_US
dc.typeArticle
dc.wos.quartileQ1 (Sport sciences)en_US
dc.wos.quartileQ3 (Physiology)en_US

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