Faster V̇O2 kinetics after priming exercises of different duration but same fatigue

Felipe Mattioni Maturana; Arthur Peyrard; John Temesi; Guillaume Y. Millet; Juan M. Murias

doi:10.1080/02640414.2017.1356543

Faster V̇O₂ kinetics after priming exercises of different duration but same fatigue

Felipe Mattioni Maturana, Arthur Peyrard, John Temesi, Guillaume Y. Millet, Juan M. Murias^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

This study compared the responses of two priming exercises of similar fatigue on the adjustment of the oxygen uptake time constant (τV̇O₂) in cycling. Ten healthy young adults (25 ± 3 yr) performed: three step transitions from a 20-W baseline to the power output (PO) below the gas exchange threshold (MOD, MOD_PRE); a 3-min bout (P_3MIN) at 90% of peak PO (PO_peak), followed by MOD (MOD_3MIN); and a 6-min bout (P_6MIN) at 80% of PO_peak followed by MOD (MOD_6MIN). The O₂ supply-to-O₂ demand ([HHb]/V̇O₂) ratio was calculated for MOD_PRE, MOD_3MIN, and MOD_6MIN. Neuromuscular fatigue was measured isometrically pre- and post-priming exercise. Reductions in maximal voluntary contraction (−29 ± 6 vs −34 ± 7%) and high-frequency doublet amplitude (−48 ± 13 vs −43 ± 11%) were not significantly different between P_3MIN vs P_6MIN, suggesting similar fatigue. τV̇O₂ for MOD_3MIN and MOD_6MIN were similar, being ~25% smaller than MOD_PRE. The [HHb]/V̇O₂ ratio was significantly greater in MOD_PRE (1.13 ± 0.12) compared to MOD_3MIN (1.02 ± 0.04) and MOD_6MIN (1.02 ± 0.04). This study showed that priming exercise of shorter duration and higher intensity, was sufficient to accelerate V̇O₂ kinetics similarly to that observed subsequent to P_6MIN when the muscle fatigue was similar.

Original language	English
Pages (from-to)	1095-1102
Number of pages	8
Journal	Journal of Sports Sciences
Volume	36
Issue number	10
Early online date	19 Jul 2017
DOIs	https://doi.org/10.1080/02640414.2017.1356543
Publication status	Published - 19 May 2018
Externally published	Yes

Keywords

Cycling performance
high-intensity exercise
near-infrared spectroscopy
neuromuscular fatigue
oxidative phosphorylation

Access to Document

10.1080/02640414.2017.1356543

Cite this

@article{7470018ff1e74a949d116c602555dab6,

title = "Faster {\.V}O2 kinetics after priming exercises of different duration but same fatigue",

abstract = "This study compared the responses of two priming exercises of similar fatigue on the adjustment of the oxygen uptake time constant (τ{\.V}O2) in cycling. Ten healthy young adults (25 ± 3 yr) performed: three step transitions from a 20-W baseline to the power output (PO) below the gas exchange threshold (MOD, MODPRE); a 3-min bout (P3MIN) at 90% of peak PO (POpeak), followed by MOD (MOD3MIN); and a 6-min bout (P6MIN) at 80% of POpeak followed by MOD (MOD6MIN). The O2 supply-to-O2 demand ([HHb]/{\.V}O2) ratio was calculated for MODPRE, MOD3MIN, and MOD6MIN. Neuromuscular fatigue was measured isometrically pre- and post-priming exercise. Reductions in maximal voluntary contraction (−29 ± 6 vs −34 ± 7%) and high-frequency doublet amplitude (−48 ± 13 vs −43 ± 11%) were not significantly different between P3MIN vs P6MIN, suggesting similar fatigue. τ{\.V}O2 for MOD3MIN and MOD6MIN were similar, being ~25% smaller than MODPRE. The [HHb]/{\.V}O2 ratio was significantly greater in MODPRE (1.13 ± 0.12) compared to MOD3MIN (1.02 ± 0.04) and MOD6MIN (1.02 ± 0.04). This study showed that priming exercise of shorter duration and higher intensity, was sufficient to accelerate {\.V}O2 kinetics similarly to that observed subsequent to P6MIN when the muscle fatigue was similar.",

keywords = "Cycling performance, high-intensity exercise, near-infrared spectroscopy, neuromuscular fatigue, oxidative phosphorylation",

author = "{Mattioni Maturana}, Felipe and Arthur Peyrard and John Temesi and Millet, {Guillaume Y.} and Murias, {Juan M.}",

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T1 - Faster V̇O2 kinetics after priming exercises of different duration but same fatigue

AU - Mattioni Maturana, Felipe

AU - Peyrard, Arthur

AU - Temesi, John

AU - Millet, Guillaume Y.

AU - Murias, Juan M.

PY - 2018/5/19

Y1 - 2018/5/19

N2 - This study compared the responses of two priming exercises of similar fatigue on the adjustment of the oxygen uptake time constant (τV̇O2) in cycling. Ten healthy young adults (25 ± 3 yr) performed: three step transitions from a 20-W baseline to the power output (PO) below the gas exchange threshold (MOD, MODPRE); a 3-min bout (P3MIN) at 90% of peak PO (POpeak), followed by MOD (MOD3MIN); and a 6-min bout (P6MIN) at 80% of POpeak followed by MOD (MOD6MIN). The O2 supply-to-O2 demand ([HHb]/V̇O2) ratio was calculated for MODPRE, MOD3MIN, and MOD6MIN. Neuromuscular fatigue was measured isometrically pre- and post-priming exercise. Reductions in maximal voluntary contraction (−29 ± 6 vs −34 ± 7%) and high-frequency doublet amplitude (−48 ± 13 vs −43 ± 11%) were not significantly different between P3MIN vs P6MIN, suggesting similar fatigue. τV̇O2 for MOD3MIN and MOD6MIN were similar, being ~25% smaller than MODPRE. The [HHb]/V̇O2 ratio was significantly greater in MODPRE (1.13 ± 0.12) compared to MOD3MIN (1.02 ± 0.04) and MOD6MIN (1.02 ± 0.04). This study showed that priming exercise of shorter duration and higher intensity, was sufficient to accelerate V̇O2 kinetics similarly to that observed subsequent to P6MIN when the muscle fatigue was similar.

AB - This study compared the responses of two priming exercises of similar fatigue on the adjustment of the oxygen uptake time constant (τV̇O2) in cycling. Ten healthy young adults (25 ± 3 yr) performed: three step transitions from a 20-W baseline to the power output (PO) below the gas exchange threshold (MOD, MODPRE); a 3-min bout (P3MIN) at 90% of peak PO (POpeak), followed by MOD (MOD3MIN); and a 6-min bout (P6MIN) at 80% of POpeak followed by MOD (MOD6MIN). The O2 supply-to-O2 demand ([HHb]/V̇O2) ratio was calculated for MODPRE, MOD3MIN, and MOD6MIN. Neuromuscular fatigue was measured isometrically pre- and post-priming exercise. Reductions in maximal voluntary contraction (−29 ± 6 vs −34 ± 7%) and high-frequency doublet amplitude (−48 ± 13 vs −43 ± 11%) were not significantly different between P3MIN vs P6MIN, suggesting similar fatigue. τV̇O2 for MOD3MIN and MOD6MIN were similar, being ~25% smaller than MODPRE. The [HHb]/V̇O2 ratio was significantly greater in MODPRE (1.13 ± 0.12) compared to MOD3MIN (1.02 ± 0.04) and MOD6MIN (1.02 ± 0.04). This study showed that priming exercise of shorter duration and higher intensity, was sufficient to accelerate V̇O2 kinetics similarly to that observed subsequent to P6MIN when the muscle fatigue was similar.

KW - Cycling performance

KW - high-intensity exercise

KW - near-infrared spectroscopy

KW - neuromuscular fatigue

KW - oxidative phosphorylation

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DO - 10.1080/02640414.2017.1356543

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