Oxygen uptake and muscle deoxygenation kinetics during skating: Comparison between slide-board and treadmill skating

Tatiane Piucco, Rogério Soares, Fernando Diefenthaeler, Guillaume Y. Millet, Juan M. Murias*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Purpose: To compare the oxygen-uptake (VO2) kinetics during skating on a treadmill and skating on a slide board and to discuss potential mechanisms that might control the VO2 kinetics responses during skating. Methods: Breath-by-breath pulmonary VO2 and near-infrared spectroscopy–derived muscle deoxygenated hemoglobin and myoglobin ([HHbMb]) were monitored continuously in 12 well-trained, young, long-track speed skaters. On-transient VO2 and [HHbMb] responses to skating on a treadmill and skating on a slide board at 80% of the estimated gas exchange threshold were fitted as monoexponential function. The signals were time-aligned, and the individual [HHbMb]-to-VO2 ratio was calculated as the average value from 20 to 120 s after exercise starts. Results: The time constants for the adjustment of phase II VO2 (τ VO2) and [HHbMb] (τ [HHbMb]) were low and similar between slide board and treadmill skating (18.1 [3.4] vs 18.9 [3.6] for τ VO2 and 12.6 [4.0] vs 12.4 [4.0] s for τ [HHbMb]). The ½HHbMb∶VO2 ratio was not different from 1.0 (P > .05) in both conditions. Conclusions: The fast VO2 kinetics during skating suggest that chronic adaptation to skating might overcome any possible restriction in leg blood flow during low-intensity exercise. The VO2 ratio values also suggest a good matching of O2 delivery to O2 utilization in trained speed skaters. The similar τ VO2 and τ [HHbMb] values between slide board and treadmill further reinforce the validity of using a slide board for skating testing and training purposes.

Original languageEnglish
Pages (from-to)783-788
Number of pages6
JournalInternational Journal of Sports Physiology and Performance
Volume13
Issue number6
DOIs
Publication statusPublished - Jul 2018
Externally publishedYes

Keywords

  • Speed skating
  • Test validity
  • Training
  • VO kinetics

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