| Autor: |
Possamai, Leonardo Trevisol, de Aguiar, Rafael Alves, Borszcz, Fernando Klitzke, Salvador, Paulo Cesar do Nascimento, de Lucas, Ricardo Dantas, Turnes, Tiago |
| Předmět: |
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| Zdroj: |
Research Quarterly for Exercise & Sport; Dec2023, Vol. 94 Issue 4, p1020-1027, 8p |
| Abstrakt: |
Purpose: The muscle oxygen uptake (mVO2) kinetics following exercise, measured by near-infrared spectroscopy, has been used as a functional evaluation of muscle oxidative metabolism. This study aimed to determine the mVO2 off-kinetics and verify the relationship of the recovery rate of mVO2 (k) with time-trial performance and different aerobic parameters in trained rowers. Methods: Eleven male rowers (age: 20 ± 3 years; VO2max: 4.28 ± 0.35 L·min-1) used a rowing ergometer to perform (I) an incremental test to determine the maximal oxygen uptake (VO2max) and peak power output (Ppeak); (II) several visits to determine maximal lactate steady state (MLSS); and (III) a 2000-m rowing ergometer performance test. Also, one test to determine mVO2 off-kinetics of the vastus lateralis muscle using a repeated arterial occlusions protocol. Results: The mVO2 generated a good monoexponential fit (R² = 0.960 ± 0.030; SEE = 0.041 ± 0.018%.s-1). The k of mVO2 (2.06 ± 0.58 min-1) was associated with relative VO2max (r = 0.79), power output at MLSS (r = 0.76), and Ppeak (r = 0.83); however, it was not related with 2000-m rowing performance (r = -0.38 to 0.52; p > .152). Conclusion: These findings suggest that although not associated with rowing performance, the mVO2 off-kinetics determined after a submaximal isometric knee extension may be a practical and less-exhaustive approach than invasive responses and incremental tests to assess the muscle oxidative metabolism during a training program. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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