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dc.contributor.authorHatle, Håvard
dc.contributor.authorStøbakk, Per Kristian
dc.contributor.authorHansen, Harald Edvard Mølmen
dc.contributor.authorBrønstad, Eivind
dc.contributor.authorTjønna, Arnt Erik
dc.contributor.authorSteinshamn, Sigurd Loe
dc.contributor.authorSkogvoll, Eirik
dc.contributor.authorWisløff, Ulrik
dc.contributor.authorIngul, Charlotte Bjørk
dc.contributor.authorRognmo, Øivind
dc.date.accessioned2015-11-24T12:56:02Z
dc.date.accessioned2015-12-04T09:38:24Z
dc.date.available2015-11-24T12:56:02Z
dc.date.available2015-12-04T09:38:24Z
dc.date.issued2014
dc.identifier.citationPLoS ONE 2014, 9(2)nb_NO
dc.identifier.issn1932-6203
dc.identifier.urihttp://hdl.handle.net/11250/2366906
dc.description.abstractPurpose: The training response of an intensified period of high-intensity exercise is not clear. Therefore, we compared the cardiovascular adaptations of completing 24 high-intensity aerobic interval training sessions carried out for either three or eight weeks, respectively. Methods: Twenty-one healthy subjects (23.0±2.1 years, 10 females) completed 24 high-intensity training sessions throughout a time-period of either eight weeks (moderate frequency, MF) or three weeks (high frequency, HF) followed by a detraining period of nine weeks without any training. In both groups, maximal oxygen uptake (VO2max) was evaluated before training, at the 9th and 17th session and four days after the final 24th training session. In the detraining phase VO2max was evaluated after 12 days and thereafter every second week for eight weeks. Left ventricular echocardiography, carbon monoxide lung diffusion transfer factor, brachial artery flow mediated dilatation and vastus lateralis citrate maximal synthase activity was tested before and after training. Results: The cardiovascular adaptation after HF training was delayed compared to training with MF. Four days after ending training the HF group showed no improvement (+3.0%, p = 0.126), whereas the MF group reached their highest VO2max with a 10.7% improvement (p<0.001: group difference p = 0.035). The HF group reached their highest VO2max (6.1% increase, p = 0.026) twelve days into the detraining period, compared to a concomitant reduction to 7.9% of VO2max (p<0.001) above baseline in the MF group (group difference p = 0.609). Conclusion: Both HF and MF training of high-intensity aerobic exercise improves VO2max. The cardiovascular adaptation following a HF programme of high-intensity exercise is however delayed compared to MF training.nb_NO
dc.language.isoengnb_NO
dc.publisherPublic Library of Sciencenb_NO
dc.titleEffect of 24 sessions of high-intensity aerobic interval training carried out at either high or moderate frequency, a randomized trialnb_NO
dc.typeJournal articlenb_NO
dc.typePeer revieweden_GB
dc.date.updated2015-11-24T12:56:02Z
dc.source.volume9nb_NO
dc.source.journalPLoS ONEnb_NO
dc.source.issue2nb_NO
dc.identifier.doi10.1371/journal.pone.0088375
dc.identifier.cristin1167867
dc.description.localcode© 2014 Hatle et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.nb_NO


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