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dc.contributor.authorSchaumberg, M.A.
dc.contributor.authorStanley, J.
dc.contributor.authorJenkins, D.G.
dc.contributor.authorHume, E.A.
dc.contributor.authorJanse de Jonge, X.A.K.
dc.contributor.authorEmmerton, Lynne
dc.contributor.authorSkinner, T.L.
dc.date.accessioned2020-09-15T00:10:36Z
dc.date.available2020-09-15T00:10:36Z
dc.date.issued2020
dc.identifier.citationSchaumberg, M.A. and Stanley, J. and Jenkins, D.G. and Hume, E.A. and Janse de Jonge, X.A.K. and Emmerton, L.M. and Skinner, T.L. 2020. Oral Contraceptive Use Influences On-Kinetic Adaptations to Sprint Interval Training in Recreationally-Active Women. Frontiers in Physiology. 11: Article No. 629.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/81001
dc.identifier.doi10.3389/fphys.2020.00629
dc.description.abstract

© Copyright © 2020 Schaumberg, Stanley, Jenkins, Hume, Janse de Jonge, Emmerton and Skinner. Introduction: Oral contraceptive (OC) use influences peak exercise responses to training, however, the influence of OC on central and peripheral adaptations to exercise training are unknown. This study investigated the influence of OC use on changes in time-to-fatigue, pulmonary oxygen uptake, cardiac output, and heart rate on-kinetics, as well as tissue saturation index to 4 weeks of sprint interval training in recreationally active women. Methods: Women taking an oral contraceptive (OC; n = 25) or experiencing natural menstrual cycles (MC; n = 22) completed an incremental exercise test to volitional exhaustion followed by a square-wave step-transition protocol to moderate (90% of power output at ventilatory threshold) and high intensity (Δ50% of power output at ventilatory threshold) exercise on two separate occasions. Time-to-fatigue, pulmonary oxygen uptake on-kinetics, cardiac output, and heart rate on-kinetics, and tissue saturation index responses were assessed prior to, and following 12 sessions of sprint interval training (10 min × 1 min efforts at 100–120% PPO in a 1:2 work:rest ratio) completed over 4 weeks. Results: Time-to-fatigue increased in both groups following training (p < 0.001), with no difference between groups. All cardiovascular on-kinetic parameters improved to the same extent following training in both groups. Greater improvements in pulmonary oxygen up-take kinetics were seen at both intensities in the MC group (p < 0.05 from pre-training) but were blunted in the OC group (p > 0.05 from pre-training). In contrast, changes in tissue saturation index were greater in the OC group at both intensities (p < 0.05); with the MC group showing no changes at either intensity. Discussion: Oral contraceptive use may reduce central adaptations to sprint interval training in women without influencing improvements in exercise performance - potentially due to greater peripheral adaptation. This may be due to the influence of exogenous oestradiol and progestogen on cardiovascular function and skeletal muscle blood flow. Further investigation into female-specific influences on training adaptation and exercise performance is warranted.

dc.languageEnglish
dc.publisherFRONTIERS MEDIA SA
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectScience & Technology
dc.subjectLife Sciences & Biomedicine
dc.subjectPhysiology
dc.subjectfemale
dc.subjecttraining adaptation
dc.subjectovarian hormones
dc.subjectoral contraceptive (OC)
dc.subjectexogenous hormones
dc.subjectcardiorespiratory
dc.subjecttime-to-fatigue
dc.subjectOXYGEN-UPTAKE KINETICS
dc.subjectMODERATE-INTENSITY EXERCISE
dc.subjectPULMONARY O-2 UPTAKE
dc.subjectMUSCLE DEOXYGENATION
dc.subjectCARDIAC-OUTPUT
dc.subjectPHYSIOLOGICAL ADAPTATIONS
dc.subjectSKELETAL-MUSCLE
dc.subjectBLOOD-FLOW
dc.subjectPERFORMANCE
dc.subjectCYCLE
dc.titleOral Contraceptive Use Influences On-Kinetic Adaptations to Sprint Interval Training in Recreationally-Active Women
dc.typeJournal Article
dcterms.source.volume11
dcterms.source.issn1664-042X
dcterms.source.titleFrontiers in Physiology
dc.date.updated2020-09-15T00:10:32Z
curtin.note

© 2020 The Authors. Published in Frontiers in Physiology.

curtin.departmentSchool of Pharmacy and Biomedical Sciences
curtin.accessStatusOpen access
curtin.facultyFaculty of Health Sciences
curtin.contributor.orcidEmmerton, Lynne [0000-0002-0806-6691]
curtin.identifier.article-numberARTN 629
dcterms.source.eissn1664-042X
curtin.contributor.scopusauthoridEmmerton, Lynne [6603454936]


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