title: Low sampling rates bias outcomes from the Wingate test.
abstract: The purpose of this work was to apply a simple method for acquisition of power output (PO) during the Wingate Anaerobic Test (WAnT) at a high sampling rate ( S(R)) and to compare the effect of lower S(R) on the measurements extracted from the PO. 26 male subjects underwent 2 WAnTs on a cycle ergometer. The reference PO was calculated at 30 Hz as a function of the linear velocity, the moment of inertia and the frictional load. The PO was sampled at 0.2, 0.5, 1, 2 and 5 Hz. Both the peak (16.03±2.22 W·kg (-1)) and mean PO (10.34±1.01 W·kg (-1)) presented lower relative values when the S(R) was lower. Peak PO was attenuated by 0.29-42.07% for decreasing sampling rates, resulting in different values for 0.2 and 1 Hz ( P<0.001). When the S(R) was 0.2 Hz, the time to peak was delayed by 53.81% ( P<0.001) and the fatigue index was attenuated by 22.12% ( P<0.001). In conclusion, due to the differences achieved here and the fact that the peak flywheel frequency is around 2.3 Hz, we strongly recommend that the PO be sampled at 5 Hz instead of 0.2 Hz in order to avoid biased errors and misunderstandings of the WAnT results.
authors.affiliation: Federal University of Rio de Janeiro, Biomedical Engineering Program - COPPE, Rio de Janeiro, Brazil. edil.luis@peb.ufrj.br
authors.forename: E L
authors.initials: EL
authors.lastname: Santos
authors.forename: J S
authors.initials: JS
authors.lastname: Novaes
authors.forename: V M
authors.initials: VM
authors.lastname: Reis
authors.forename: A
authors.initials: A
authors.lastname: Giannella-Neto
mesh_terms: D000293:Adolescent; D000328:Adult; D015308:Anaerobic Threshold; D054874:Athletic Performance / Q000502:physiology*; D016552:Ergometry; D005080:Exercise Test / Q000379:methods*; D006801:Humans; D008297:Male; D055815:Young Adult