Sigmoidal VO2 on-kinetics: A new pattern in VO2 responses at the lower district of extreme exercise domain

Basit Öğe Kaydı
dc.contributor.authorBalci, Gorkem Aybars
dc.contributor.authorAs, Hakan
dc.contributor.authorOzkaya, Ozgur
dc.date.accessioned2020-12-01T11:57:59Z
dc.date.available2020-12-01T11:57:59Z
dc.date.issued2020
dc.departmentEge Üniversitesien_US
dc.description.abstractThe aim of the study was to analyse the VO2 on-kinetics belonging to the work rates within the lower district of extreme exercise domain. Maximal O-2 utilisation and peak power outputs of eight well-trained cyclists were revealed by multisession trails. Critical threshold (CT) as the lower boundary of severe domain and aerobic limit power (ALP) as the upper boundary of severe domain were determined by multisession constant-load exercises. VO2 on-kinetics over time were best fitted by multicomponent exponential models described by an initial concave-up response known as cardio-dynamic phase (tau = 18.2 +/- 2.88 s; alpha = 1.56 + 0.39 L.min(-1)) before a primary concave-up phase (tau = 35.4 +/- 12.4 s; alpha = 1.53 +/- 0.36 L.min(-1)), and then a slow component in two of the participants (tau = 80.8 +/- 37 s; alpha = 0.47 +/- 0.05 L.min(-1)) or without a slow component in six of the participants during exercises performed at 50 W above the CT (R-2 >= 0.96; SEE <= 0.24; p < 0.001). However, VO2 on-kinetics over time belonging to exercises performed at 50 W above the ALP were best fitted by sigmoidal model (R-2 >0.98; SEE < 0.14; p < 0.001) in comparison with linear (R-2 = 0.37-0.66; SEE = 0.46-0.64; p < 0.01), or exponential functions (p> 0.05). Indeed, during those exercises, a short period of convex-up response = 16.8 +/- 3.1 s; alpha = 1.72 + 0.39 L.min(-1)) was determined just before a concave-up primary phase in VO2 over time (r = 24.6 +/- 5.86 s; alpha = 1.31 +/- 0.20 L.min(-1)). It was shown that multicomponent exponential trend in VO2 transformed into a sigmoidal shape, once the work rate exceeded the upper boundary of severe exercise domain.en_US
dc.description.sponsorshipScientific Research Projects Fundation of Ege University [17-BESYO-003]en_US
dc.description.sponsorshipThis work was supported by the Scientific Research Projects Fundation of Ege University (grant ID: 17-BESYO-003), Turkey.en_US
dc.identifier.doi10.1016/j.resp.2020.103507en_US
dc.identifier.issn1569-9048
dc.identifier.issn1878-1519
dc.identifier.pmid32726644en_US
dc.identifier.scopus2-s2.0-85089003137en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1016/j.resp.2020.103507
dc.identifier.urihttps://hdl.handle.net/11454/61886
dc.identifier.volume281en_US
dc.identifier.wosWOS:000569342800014en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofRespiratory Physiology & Neurobiologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAerobic poweren_US
dc.subjectAerobic limit poweren_US
dc.subjectCritical thresholden_US
dc.subjectSevere exercise domainen_US
dc.subjectAnaerobic performanceen_US
dc.subjectVO2maxen_US
dc.titleSigmoidal VO2 on-kinetics: A new pattern in VO2 responses at the lower district of extreme exercise domainen_US
dc.typeArticleen_US

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
PubMed İndeksli Yayın Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu