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Fatigue-Free Force-Velocity and Power-Velocity Profiles for Elite Track Sprint Cyclists: The Influence of Duration, Gear Ratio and Pedalling Rates
Department of Endurance Sports, Institute for Applied Training Science, 04109 Leipzig, Germany.
German Cycling Federation, 60528 Frankfurt, Germany.
Department of Biomechanics, Institute for Applied Training Science, 04109 Leipzig, Germany; Department of Engineering and Industrial Design, Magdeburg-Stendal University of Applied Sciences, 39114 Magdeburg, Germany.ORCID iD: 0000-0002-6822-5201
Luleå University of Technology, Department of Health, Learning and Technology, Health, Medicine and Rehabilitation. Department of Physiology and Pharmacology, Biomedicum C5, Karolinska Institutet, 171 77 Stockholm, Sweden.ORCID iD: 0000-0002-3814-6246
2022 (English)In: Sports, E-ISSN 2075-4663, Vol. 10, no 9, article id 130Article in journal (Refereed) Published
Abstract [en]

Background: Maximal force-velocity (F/v) profiles for track cyclists are commonly derived from ergometer sprints using an isovelocity or isoinertial approach. Previously, an attempt was made to derive maximal F/v profiles from a single maximal 65-m sprint on the cycling track. Hypothesising that this approach may not accurately reflect the fatigue-free F/v profile, we propose an alternative procedure and compare it to the previous method. Moreover, we test for the impact of gear ratio on diagnostic results.

Methods: Twelve elite track cyclists completed a high-cadence low-resistance pedalling test on a freestanding roller (motoric test) and two series of three maximal 65-m sprints on a cycling track with different gear ratios. F/v profiles were calculated based on the measured crank force and cadence either during the first 6–7 revolutions (≤6 s) on the track (model I) or were derived from the first 3–4 revolutions (≤3 s) on the track combined with 1 or 2 fatigue-free cycles at cadences above 160 rpm from the motoric test (model II).

Results: Although both models exhibit high-to-excellent linearity between force and velocity, the extrapolated isometric force was higher (1507.51 ± 257.60 N and 1384.35 ± 276.84 N; p < 0.002; d = 2.555) and the slope steeper (−6.78 ± 1.17 and −5.24 ± 1.11; p < 0.003, d = −2.401) with model I. An ICC of 1.00 indicates excellent model consistency when comparing the F/v profiles (model II) derived from the different geared sprints.

Conclusions: Assuring fatigue-free measurements and including high-cadence data points in the calculations provide valid maximal F/v and P/v profiles from a single acceleration-sprint independent of gear ratio.

Place, publisher, year, edition, pages
MDPI, 2022. Vol. 10, no 9, article id 130
Keywords [en]
F/v-profile, validity, track cycling, fatigue-free performance, performance diagnostics
National Category
Sport and Fitness Sciences Physiology and Anatomy
Research subject
Physiotherapy; Centre - Swedish Sports Technology and Performance Research Centre (SPORTC)
Identifiers
URN: urn:nbn:se:ltu:diva-93290DOI: 10.3390/sports10090130ISI: 000857614600001PubMedID: 36136385Scopus ID: 2-s2.0-85138651247OAI: oai:DiVA.org:ltu-93290DiVA, id: diva2:1699588
Note

Validerad;2022;Nivå 2;2022-09-28 (joosat);

Funder: BMI (Federal Ministry of the Interior and Community, Germany)

Available from: 2022-09-28 Created: 2022-09-28 Last updated: 2025-02-11Bibliographically approved

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Holmberg, Hans-Christer

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