dc.contributor.author | Seeberg, Trine Margrethe | |
dc.contributor.author | Kocbach, Jan | |
dc.contributor.author | Danielsen, Jørgen | |
dc.contributor.author | Noordhof, Dionne | |
dc.contributor.author | Skovereng, Knut | |
dc.contributor.author | Hatling Haugnes, Pål | |
dc.contributor.author | Tjønnås, Johannes | |
dc.contributor.author | Sandbakk, Øyvind Bucher | |
dc.date.accessioned | 2022-06-10T13:28:30Z | |
dc.date.available | 2022-06-10T13:28:30Z | |
dc.date.created | 2021-11-10T17:55:49Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Frontiers in Physiology. 2021, 12, 638499. | en_US |
dc.identifier.issn | 1664-042X | |
dc.identifier.uri | https://hdl.handle.net/11250/2998338 | |
dc.description.abstract | The most common race format in cross-country (XC) skiing is the mass-start event, which is under-explored in the scientific literature. To explore factors important for XC skiing mass-starts, the main purpose of this study was to investigate physiological and biomechanical determinants of sprint ability following variable intensity exercise when roller ski skating. Thirteen elite male XC skiers performed a simulated mass-start competition while roller ski skating on a treadmill. The protocol consisted of an initial 21-min bout with a varying track profile, designed as a competition track with preset inclines and speeds, directly followed by an all-out sprint (AOS) with gradually increased speed to rank their performance. The initial part was projected to simulate the “stay-in-the-group” condition during a mass-start, while the AOS was designed to assess the residual physiological capacities required to perform well during the final part of a mass-start race. Cardiorespiratory variables, kinematics and pole forces were measured continuously, and the cycles were automatically detected and classified into skating sub-techniques through a machine learning model. Better performance ranking was associated with higher VO2Max (r = 0.68) and gross efficiency (r = 0.70) measured on separate days, as well as the ability to ski on a lower relative intensity [i.e., %HRMax (r = 0.87), %VO2Max (r = 0.89), and rating of perceived exertion (r = 0.73)] during the initial 21-min of the simulated mass-start (all p-values < 0.05). Accordingly, the ability to increase HR (r = 0.76) and VO2 (r = 0.72), beyond the corresponding values achieved during the initial 21-min, in the AOS correlated positively with performance (both p < 0.05). In addition, greater utilization of the G3 sub-technique in the steepest uphill (r = 0.69, p < 0.05), as well as a trend for longer cycle lengths (CLs) during the AOS (r = 0.52, p = 0.07), were associated with performance. In conclusion, VO2Max and gross efficiency were the most significant performance-determining variables of simulated mass-start performance, enabling lower relative intensity and less accumulation of fatigue before entering the final AOS. Subsequently, better performance ranking was associated with more utilization of the demanding G3 sub-technique in the steepest uphill, and physiological reserves allowing better-performing skiers to utilize a larger portion of their aerobic potential and achieve longer CLs and higher speed during the AOS. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Frontiers | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.subject | Cross-country skiing | en_US |
dc.subject | Gross efficiency | en_US |
dc.subject | Skiing technique | en_US |
dc.subject | Maximal oxygen consumption | en_US |
dc.subject | Inertial measurement unit | en_US |
dc.subject | Near-infra red spectroscopy | en_US |
dc.subject | Physiological determinants | en_US |
dc.subject | Biomechanical determinants | en_US |
dc.title | Physiological and Biomechanical Determinants of Sprint Ability Following Variable Intensity Exercise When Roller Ski Skating | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | © 2021 Seeberg, Kocbach, Danielsen, Noordhof, Skovereng, Haugnes, Tjønnås and Sandbakk | en_US |
dc.source.volume | 12 | en_US |
dc.source.journal | Frontiers in Physiology | en_US |
dc.identifier.doi | 10.3389/fphys.2021.638499 | |
dc.identifier.cristin | 1953377 | |
dc.relation.project | Norges forskningsråd: 270791 | en_US |
dc.source.articlenumber | 638499 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |