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https://hdl.handle.net/1959.11/16489
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DC Field | Value | Language |
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dc.contributor.author | Neal, Craig M | en |
dc.contributor.author | Hunter, Angus M | en |
dc.contributor.author | Brennan, Lorraine | en |
dc.contributor.author | O'Sullivan, Aifric | en |
dc.contributor.author | Hamilton, D Lee | en |
dc.contributor.author | de Vito, Giuseppe | en |
dc.contributor.author | Galloway, Stuart D R | en |
dc.date.accessioned | 2015-01-15T15:42:00Z | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | Journal of Applied Physiology, 114(4), p. 461-471 | en |
dc.identifier.issn | 1522-1601 | en |
dc.identifier.issn | 8750-7587 | en |
dc.identifier.uri | https://hdl.handle.net/1959.11/16489 | - |
dc.description.abstract | This study was undertaken to investigate physiological adaptation with two endurance-training periods differing in intensity distribution. In a randomized crossover fashion, separated by 4 wk of detraining, 12 male cyclists completed two 6-wk training periods: 1) a polarized model [6.4 (±1.4 SD) h/wk; 80%, 0%, and 20% of training time in low-, moderate-, and high-intensity zones, respectively]; and 2) a threshold model [7.5 (±2.0 SD) h/wk; 57%, 43%, and 0% training-intensity distribution]. Before and after each training period, following 2 days of diet and exercise control, fasted skeletal muscle biopsies were obtained for mitochondrial enzyme activity and monocarboxylate transporter (MCT) 1 and 4 expression, and morning first-void urine samples were collected for NMR spectroscopy-based metabolomics analysis. Endurance performance (40-km time trial), incremental exercise, peak power output (PPO), and high-intensity exercise capacity (95% maximal work rate to exhaustion) were also assessed. Endurance performance, PPOs, lactate threshold (LT), MCT4, and high-intensity exercise capacity all increased over both training periods. Improvements were greater following polarized rather than threshold for PPO [mean (±SE) change of 8 (±2)% vs. 3 (±1)%, P < 0.05], LT [9 (±3)% vs. 2 (±4)%, P < 0.05], and high-intensity exercise capacity [85 (±14)% vs. 37 (±14)%, P < 0.05]. No changes in mitochondrial enzyme activities or MCT1 were observed following training. A significant multilevel, partial least squares-discriminant analysis model was obtained for the threshold model but not the polarized model in the metabolomics analysis. A polarized training distribution results in greater systemic adaptation over 6 wk in already well-trained cyclists. Markers of muscle metabolic adaptation are largely unchanged, but metabolomics markers suggest different cellular metabolic stress that requires further investigation. | en |
dc.language | en | en |
dc.publisher | American Physiological Society | en |
dc.relation.ispartof | Journal of Applied Physiology | en |
dc.title | Six weeks of a polarized training-intensity distribution leads to greater physiological and performance adaptations than a threshold model in trained cyclists | en |
dc.type | Journal Article | en |
dc.identifier.doi | 10.1152/japplphysiol.00652.2012 | en |
dcterms.accessRights | Gold | en |
dc.subject.keywords | Exercise Physiology | en |
dc.subject.keywords | Sports Medicine | en |
local.contributor.firstname | Craig M | en |
local.contributor.firstname | Angus M | en |
local.contributor.firstname | Lorraine | en |
local.contributor.firstname | Aifric | en |
local.contributor.firstname | D Lee | en |
local.contributor.firstname | Giuseppe | en |
local.contributor.firstname | Stuart D R | en |
local.subject.for2008 | 110604 Sports Medicine | en |
local.subject.for2008 | 110602 Exercise Physiology | en |
local.subject.seo2008 | 970111 Expanding Knowledge in the Medical and Health Sciences | en |
local.subject.seo2008 | 970106 Expanding Knowledge in the Biological Sciences | en |
local.profile.school | School of Science and Technology | en |
local.profile.email | gdevito@une.edu.au | en |
local.output.category | C1 | en |
local.record.place | au | en |
local.record.institution | University of New England | en |
local.identifier.epublicationsrecord | une-20150112-130229 | en |
local.publisher.place | United States of America | en |
local.format.startpage | 461 | en |
local.format.endpage | 471 | en |
local.peerreviewed | Yes | en |
local.identifier.volume | 114 | en |
local.identifier.issue | 4 | en |
local.access.fulltext | Yes | en |
local.contributor.lastname | Neal | en |
local.contributor.lastname | Hunter | en |
local.contributor.lastname | Brennan | en |
local.contributor.lastname | O'Sullivan | en |
local.contributor.lastname | Hamilton | en |
local.contributor.lastname | de Vito | en |
local.contributor.lastname | Galloway | en |
dc.identifier.staff | une-id:gdevito | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.identifier.unepublicationid | une:16726 | en |
local.identifier.handle | https://hdl.handle.net/1959.11/16489 | en |
dc.identifier.academiclevel | Academic | en |
local.title.maintitle | Six weeks of a polarized training-intensity distribution leads to greater physiological and performance adaptations than a threshold model in trained cyclists | en |
local.output.categorydescription | C1 Refereed Article in a Scholarly Journal | en |
local.search.author | Neal, Craig M | en |
local.search.author | Hunter, Angus M | en |
local.search.author | Brennan, Lorraine | en |
local.search.author | O'Sullivan, Aifric | en |
local.search.author | Hamilton, D Lee | en |
local.search.author | de Vito, Giuseppe | en |
local.search.author | Galloway, Stuart D R | en |
local.uneassociation | Unknown | en |
local.year.published | 2013 | en |
local.subject.for2020 | 320225 Sports medicine | en |
local.subject.for2020 | 420702 Exercise physiology | en |
local.subject.seo2020 | 280103 Expanding knowledge in the biomedical and clinical science | en |
Appears in Collections: | Journal Article |
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