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dc.contributor.author Burnley, Mark
dc.contributor.author Jones, Andrew M.
dc.contributor.author DiMenna, Fred J.
dc.contributor.author Wilkerson, Daryl P.
dc.date.accessioned 2009-06-24T18:06:58Z
dc.date.available 2009-06-24T18:06:58Z
dc.date.issued 2008-08
dc.identifier.citation Burnley , M , Jones , A M , DiMenna , F J & Wilkerson , D P 2008 , ' Influence of priming exercise on pulmonary O2 uptake kinetics during transitions to high-intensity exercise from an elevated baseline. ' Journal of Applied Physiology , pp. 538-546 . en
dc.identifier.issn 8750-7587
dc.identifier.other PURE: 106987
dc.identifier.other dspace: 2160/2523
dc.identifier.uri http://hdl.handle.net/2160/2523
dc.identifier.uri http://jap.physiology.org/cgi/content/abstract/105/2/538 en
dc.description DiMenna, F.J., Wilkerson, D.P., Burnley, M. & Jones, A.M. (2008). Influence of priming exercise on pulmonary O2 uptake kinetics during transitions to high-intensity exercise from an elevated baseline. Journal of Applied Physiology 105, 538-546. en
dc.description.abstract It has been suggested that the slower O2 uptake (VO2) kinetics observed when exercise is initiated from an elevated baseline metabolic rate are linked to an impairment of muscle O2 delivery. We hypothesized that 'priming' exercise would significantly reduce the phase II time constant (tau) during subsequent severe-intensity cycle exercise initiated from an elevated baseline metabolic rate. Seven healthy men completed exercise transitions to 70% of the difference between gas exchange threshold (GET) and peak VO2 from a moderate-intensity baseline (90% GET) on three occasions in each of the 'unprimed' and 'primed' conditions. Pulmonary gas exchange, heart rate, and the electromyogram of m. vastus lateralis were measured during all tests. The phase II VO2 kinetics were slower when severe exercise was initiated from a baseline of moderate exercise compared with unloaded pedaling (mean ± SD tau, 42 ± 15 vs. 33 ± 8 s; P <0.05), but were not accelerated by priming exercise (42 ± 17 s; P > 0.05). The amplitude of the VO2 slow component and the change in electromyogram from minutes 2 to 6 were both significantly reduced following priming exercise (VO2 slow component: from 0.47 ± 0.09 to 0.27 ± 0.13 l/min; change in integrated electromyogram between 2 and 6 min: from 51 ± 35 to 26±43% of baseline; P <0.05 for both comparisons). These results indicate that the slower phase II VO2 kinetics observed during transitions to severe exercise from an elevated baseline are not altered by priming exercise, but that the reduced VO2 slow component may be linked to changes in muscle fiber activation. en
dc.format.extent 9 en
dc.language.iso eng
dc.relation.ispartof Journal of Applied Physiology en
dc.title Influence of priming exercise on pulmonary O2 uptake kinetics during transitions to high-intensity exercise from an elevated baseline. en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.contributor.institution Department of Sport & Exercise Science en
dc.description.status Peer reviewed en


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