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Oxygen Uptake and Muscle Deoxygenation Kinetics During Skating: Comparison Between Slide-Board and Treadmill Skating

Oxygen Uptake and Muscle Deoxygenation Kinetics During Skating: Comparison Between Slide-Board and Treadmill Skating

Authors :
Rogério Nogueira Soares
Guillaume Y. Millet
Tatiane Piucco
Fernando Diefenthaeler
Juan M. Murias
Source :
International Journal of Sports Physiology and Performance. 13:783-788
Publication Year :
2018
Publisher :
Human Kinetics, 2018.

Abstract

Purpose:To compare the oxygen-uptake () kinetics during skating on a treadmill and skating on a slide board and to discuss potential mechanisms that might control thekinetics responses during skating.Methods:Breath-by-breath pulmonaryand near-infrared spectroscopy–derived muscle deoxygenated hemoglobin and myoglobin ([HHbMb]) were monitored continuously in 12 well-trained, young, long-track speed skaters. On-transientand [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-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(τ) and [HHbMb] (τ [HHbMb]) were low and similar between slide board and treadmill skating (18.1 [3.4] vs 18.9 [3.6] for τand 12.6 [4.0] vs 12.4 [4.0] s for τ [HHbMb]). Theratio was not different from 1.0 (P > .05) in both conditions.Conclusions:The fastkinetics during skating suggest that chronic adaptation to skating might overcome any possible restriction in leg blood flow during low-intensity exercise. Theratio values also suggest a good matching of O2delivery to O2utilization in trained speed skaters. The similar τand τ [HHbMb] values between slide board and treadmill further reinforce the validity of using a slide board for skating testing and training purposes.

Details

ISSN :
15550273 and 15550265
Volume :
13
Database :
OpenAIRE
Journal :
International Journal of Sports Physiology and Performance
Accession number :
edsair.doi.dedup.....6dbc0af6a73b331c0859ed65e637e15c
Full Text :
https://doi.org/10.1123/ijspp.2017-0440