dc.date.accessioned | 2019-12-08T20:04:45Z | |
dc.date.available | 2019-12-08T20:04:45Z | |
dc.date.created | 2018-10-10T11:33:53Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Karlsson, Øyvind Gilgien, Matthias Gløersen, Øyvind Nøstdahl Rud, Bjarne Losnegard, Thomas Johansen . Exercise intensity during cross-country skiing described by oxygen demands in flat and uphill terrain. Frontiers in Physiology. 2018, 9 | |
dc.identifier.uri | http://hdl.handle.net/10852/71415 | |
dc.description.abstract | Purpose: In this study wearable global navigation satellite system units were used on athletes to investigate pacing patterns by describing exercise intensities in flat and uphill terrain during a simulated cross-country ski race. Methods: Eight well-trained male skiers (age: 23.0 ± 4.8 years, height: 183.8 ± 6.8 cm, weight: 77.1 ± 6.1 kg, VO2peak: 73 ± 5 mL⋅kg-1⋅min-1) completed a 13.5-km individual time trial outdoors and a standardized indoor treadmill protocol on roller skis. Positional data were recorded during the time trial using a differential global navigation satellite system to calculate external workloads in flat and uphill terrain. From treadmill tests, the individual relationships between oxygen consumption and external workload in flat (1°) and uphill (8°) terrain were determined, in addition to VO2peak and the maximal accumulated O2-deficit. To estimate the exercise intensity in the time trial, the O2-demand in two different flat and five different uphill sections was calculated by extrapolation of individual O2-consumption/workload ratios. Results: There was a significant interaction between section and average O2-demands, with higher O2-demands in the uphill sections (110–160% of VO2peak) than in the flat sections (≤100% of VO2peak) (p < 0.01). The maximal accumulated O2-deficit associated with uphill treadmill roller skiing was significantly higher compared to flat (6.2 ± 0.5 vs. 4.6 ± 0.5 L, p < 0.01), while no significant difference was found in VO2peak. Conclusion: Cross-country (XC) skiers repeatedly applied exercise intensities exceeding their maximal aerobic power. ΣO2-deficits were higher during uphill skiing compared to flat which has implications for the duration and magnitude of supramaximal work rates that can be applied in different types of terrain. | |
dc.language | EN | |
dc.publisher | Frontiers Research Foundation | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Exercise intensity during cross-country skiing described by oxygen demands in flat and uphill terrain | |
dc.type | Journal article | |
dc.creator.author | Karlsson, Øyvind | |
dc.creator.author | Gilgien, Matthias | |
dc.creator.author | Gløersen, Øyvind Nøstdahl | |
dc.creator.author | Rud, Bjarne | |
dc.creator.author | Losnegard, Thomas Johansen | |
cristin.unitcode | 185,15,4,0 | |
cristin.unitname | Fysisk institutt | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1619307 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Frontiers in Physiology&rft.volume=9&rft.spage=&rft.date=2018 | |
dc.identifier.jtitle | Frontiers in Physiology | |
dc.identifier.volume | 9 | |
dc.identifier.pagecount | 12 | |
dc.identifier.doi | https://doi.org/10.3389/fphys.2018.00846 | |
dc.identifier.urn | URN:NBN:no-74525 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 1664-042X | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/71415/2/Karlsson%2BFrontPhysiol%2B2018%2BExercise%2Bintensity.pdf | |
dc.type.version | PublishedVersion | |
cristin.articleid | 846 | |