Reproducibility of peak power output during a 10-s cycling maximal effort using different sampling rates

J. P. Duarte, Manuel J. Coelho-e-Silva, V. Severino, D. Martinho, L. Luz, J. R. Pereira, R. Baptista, J. Valente-dos-Santos, A. Machado-Rodrigues, V. Vaz, A. Cupido-dos-Santos, J. Martín-Hernández, S. P. Cumming, R. M. Malina

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Abstract

The study was aimed to investigate the reproducibility of performance parameters obtained from 10-s maximal cycling effort against different braking forces in young adult athletes. The sample (n = 48) included male athletes aged 18.9-29.9 years (175.5 ± 6.9 cm, 76.2 ± 10.1 kg). The exercise protocol was performed in a cycle-ergometer against a random braking force (4% to 11% of body mass). Intra-individual variation was examined from repeated tests within one week. Descriptive statistics were computed and differences between sessions were tested using paired t-test. The coefficient of correlation between repeated measures, technical error of measurement (TEM), coefficient of variation and ICC were calculated. Agreement between trials was examined using the Bland-Altman procedure. Mean values of peak power were relatively stable when obtained from sampling rates of 50 Hz and ranged between 1068 watt and 1082 watt (t(47) = 1.149, p = 0.256, ES-r = 0.165) or while corresponding to a sampling rate of 1 Hz (t(47) = 0.742, p = 0.462, ES-r = 0.107). Correlations between repeated measures were high (+0.907, 95% CI: +0.839 to +0.947) and TEM about 59.3 watt (%CV = 5.52%; ICC = 0.951, 95% CI: 0.912 to 0.972). The present study suggests that reproducibility of peak power in male adult athletes tended to be acceptable and within individual error appeared unrelated to braking force.

Original languageEnglish
Pages (from-to)496-504
Number of pages9
JournalActa Physiologica Hungarica
Volume101
Issue number4
Early online date8 Sep 2014
DOIs
Publication statusPublished - 6 Dec 2014

Keywords

  • anaerobic power
  • Bland-Altman plot
  • cycle-ergometer
  • intra-class correlation
  • short-term maximal intensity effort
  • technical error of measurement reliability

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