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Physiological responses and performance factors for double-poling and diagonal-stride treadmill roller-skiing time-trial exercise
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences (HOV). UiT the Arctic University of Norway, Tromsø, Norway. (Swedish Winter Sports Research Centre)ORCID iD: 0000-0003-4433-1218
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences (HOV). University of Gävle. (Swedish Winter Sports Research Centre)ORCID iD: 0000-0002-0461-5294
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences (HOV). (Swedish Winter Sports Research Centre)
2023 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 123, no 11, p. 2495-2509Article in journal (Refereed) Published
Abstract [en]

Purpose: To compare physiological responses between a self-paced 4-min double-poling (DP) time-trial (TTDP) versus a 4-min diagonal-stride (DS) time-trial (TTDS). The relative importance of peak oxygen uptake (V ˙ O2peak), anaerobic capacity, and gross efficiency (GE) for projection of 4-min TTDP and TTDS roller-skiing performances were also examined. Methods: Sixteen highly trained male cross-country skiers performed, in each sub-technique on separate occasions, an 8 × 4-min incremental submaximal protocol, to assess individual metabolic rate (MR) versus power output (PO) relationships, followed by a 10-min passive break and then the TTDP or TTDS, with a randomized order between sub-techniques. Results: In comparison to TTDS, the TTDP resulted in 10 ± 7% lower total MR, 5 ± 4% lower aerobic MR, 30 ± 37% lower anaerobic MR, and 4.7 ± 1.2 percentage points lower GE, which resulted in a 32 ± 4% lower PO (all P < 0.01). The V ˙ O2peak and anaerobic capacity were 4 ± 4% and 30 ± 37% lower, respectively, in DP than DS (both P < 0.01). The PO for the two time-trial (TT) performances were not significantly correlated (R 2 = 0.044). Similar parabolic pacing strategies were used during both TTs. Multivariate data analysis projected TT performance using V ˙ O2peak, anaerobic capacity, and GE (TTDP, R 2 = 0.974; TTDS, R 2 = 0.848). The variable influence on projection values for V ˙ O2peak, anaerobic capacity, and GE were for TTDP, 1.12 ± 0.60, 1.01 ± 0.72, and 0.83 ± 0.38, respectively, and TTDS, 1.22 ± 0.35, 0.93 ± 0.44, and 0.75 ± 0.19, respectively. Conclusions: The results show that a cross-country skier’s “metabolic profile” and performance capability are highly sub-technique specific and that 4-min TT performance is differentiated by physiological factors, such as V ˙ O2peak, anaerobic capacity, and GE. 

Place, publisher, year, edition, pages
Springer, 2023. Vol. 123, no 11, p. 2495-2509
Keywords [en]
Anaerobic capacity, Cross-country skiing, Gross efficiency, Pacing strategy, Peak oxygen uptake
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-48555DOI: 10.1007/s00421-023-05239-8ISI: 001004457500001Scopus ID: 2-s2.0-85161517405OAI: oai:DiVA.org:miun-48555DiVA, id: diva2:1771215
Available from: 2023-06-20 Created: 2023-06-20 Last updated: 2023-11-01Bibliographically approved

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Andersson, Erik P.Lögdal, Nestor

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