In:
International Journal of Sports Physiology and Performance, Human Kinetics, Vol. 11, No. 5 ( 2016-07), p. 627-634
Abstract:
Relatively long-lasting metabolic alkalizing procedures such as bicarbonate ingestion have potential for improving performance in long-sprint to middle-distance events. Within a few minutes, hyperventilation can induce respiratory alkalosis. However, corresponding performance effects are missing or equivocal at best. Purpose: To test a potential performance-enhancing effect of respiratory alkalosis in a 30-s Wingate Anaerobic Test (WAnT). Methods: 10 men (mean ± SD age 26.6 ± 4.9 y, height 184.4 ± 6.1 cm, body-mass test 1 80.7 ± 7.7 kg, body-mass test 2 80.4 ± 7.2 kg, peak oxygen uptake 3.95 ± 0.43 L/min) performed 2 WAnTs, 1 with and 1 without a standardized 15-min hyperventilation program pre-WAnT in randomized order separated by 1 wk. Results: Compared with the control condition, hyperventilation reduced (all P 〈 .01) pCO 2 (40.5 ± 2.8 vs 22.5 ± 1.6 mm Hg) and HCO 3 − (25.5 ± 1.7 vs 22.7 ± 1.6 mmol/L) and increased (all P 〈 .01) pH (7.41 ± 0.01 vs 7.61 ± 0.03) and actual base excess (1.4 ± 1.4 vs 3.2 ± 1.6 mmol/L) pre-WAnT with an ergogenic effect on WAnT average power (681 ± 41 vs 714 ± 44 W) and total metabolic energy (138 ± 12 vs. 144 ± 13 kJ) based on an increase in glycolytic energy (81 ± 13 vs 88 ± 13 kJ). Conclusion: Hyperventilation-induced respiratory alkalosis can enhance WAnT cycling sprint performance well in the magnitude of what is seen after successful bicarbonate ingestion.
Type of Medium:
Online Resource
ISSN:
1555-0265
,
1555-0273
DOI:
10.1123/ijspp.2015-0001
Language:
Unknown
Publisher:
Human Kinetics
Publication Date:
2016
SSG:
31
