Validity and reliability of the Axiom Powertrain cycle ergometer when compared with an SRM powermeter
The purpose of this study was to determine the validity and the reliability of a stationary electromagnetically-braked cycle ergometer (Axiom PowerTrain) against the SRM power measuring crankset. Nineteen male competitive cyclists completed four tests on their bicycle equipped with a 20-strain gauges SRM crankset: a maximal aerobic power (MAP) test and three 10-min time trials (TTs) with three different simulated slopes (0, 3, and 6 %). The Axiom ergometer overestimated (p < 0.05) the SRM power output during the last stage of the MAP test and during TTs, by 5 % and 12 %, respectively. Power output (PO) of the Axiom ergometer drifted significantly (p < 0.05) with the time during TT. These findings indicate that the Axiom ergometer does not provide a valid measure of PO compared with SRM. However, the small coefficient of variation (2.2 %) during the MAP test indicates that the Axiom provides a reliable PO and that it can be used e.g. for relative PO comparisons with competitive cyclists during a race season.
© Copyright 2005 International Journal of Sports Medicine. Thieme. Kaikki oikeudet pidätetään.
Aiheet: | mittausmenetelmä tutkimusmenetelmä apuväline ergometri suorituskyky pyöräily |
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Aihealueet: | kestävyys urheilu biologiset ja lääketieteelliset tieteet tekniset ja luonnontieteet |
DOI: | 10.1055/s-2004-817855 |
Julkaisussa: | International Journal of Sports Medicine |
Julkaistu: |
2005
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Vuosikerta: | 26 |
Numero: | 1 |
Sivuja: | 59-65 |
Julkaisutyypit: | artikkeli |
Kieli: | englanti (kieli) |
Taso: | kehittynyt |