Show simple item record

dc.contributor.authorAlmquist, Nicki Winfield
dc.contributor.authorNygård, Håvard
dc.contributor.authorVegge, Geir
dc.contributor.authorHammarström, Jens Konrad Daniel
dc.contributor.authorEllefsen, Stian
dc.contributor.authorRønnestad, Bent
dc.identifier.citationScandinavian Journal of Medicine & Science in Sports. 2020, 30, 1140-1150.en_US
dc.descriptionThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. © 2020 The Authors. Scandinavian Journal of Medicine & Science In Sports published by John Wiley & Sons Ltden_US
dc.description.abstractThe purpose of this study was to compare the acute effects of time- and effort-matched high-intensity intervals on physiological, endocrine, and skeletal muscle molecular variables in elite cyclists. Eight elite cyclists performed short intervals (SI: 30-seconds) and long intervals (LI: 5-minutes) with work:recovery ratio 2:1, using a randomized crossover design. SI was associated with 14% ± 3% higher mean power output (SI; 421 ± 27 vs LI; 371 ± 22 W), and longer working time above 90% of maximal oxygen uptake (VO2max, 54% ± 76%) and 90% peak heart rate (HRpeak, 153% ± 148%) than LI (all P < .05), despite similar degrees of perceived exertion, blood lactate levels and muscle activation measured using EMG root mean square (EMG rms). In blood, SI was associated with more pronounced increases in testosterone and testosterone-tosex hormone-binding globulin (SHBG) ratios, as well as prolonged cortisol responses (P < .05). In skeletal muscle (m. Vastus lateralis), SI and LI led to similar changes in mRNA abundance for a range of transcripts, with the exception of NHE1 mRNA, which decreased after SI (P < .05). Overall, SI was associated with more pronounced physiological and endocrine responses than LI in elite cyclists, suggesting that such training might lead to superior adaptations in elite cyclists.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectendocrine responsesen_US
dc.subjecthigh-intensity intervalsen_US
dc.subjectmRNA expressionen_US
dc.titleSystemic and muscular responses to effort-matched short intervals and long intervals in elite cyclistsen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.source.journalScandinavian Journal of Medicine & Science in Sportsen_US

Files in this item


This item appears in the following Collection(s)

Show simple item record

Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal