The effects of sodium bicarbonate supplementation at individual time-to-peak blood bicarbonate on 4-km cycling time trial performance in the heat.
Journal article
Gough, Lewis A., Williams, Jake J., Newbury, Josh W. and Gurton, William H. 2021. The effects of sodium bicarbonate supplementation at individual time-to-peak blood bicarbonate on 4-km cycling time trial performance in the heat. European Journal of Sport Science. 22 (2). https://doi.org/10.1080/17461391.2021.1998644
| Authors | Gough, Lewis A., Williams, Jake J., Newbury, Josh W. and Gurton, William H. |
|---|---|
| Abstract | The purpose of this study was to explore the effect of individualised sodium bicarbonate (NaHCO ) supplementation according to a pre-established individual time-to-peak (TTP) blood bicarbonate (HCO ) on 4-km cycling time trial (TT) performance in the heat. Eleven recreationally trained male cyclists (age: 28 ± 6 years, height: 180 ± 6 cm, body mass: 80.5 ± 8.4 kg) volunteered for this study in a randomised, crossover, triple-blind, placebo-controlled design. An initial visit was conducted to determine TTP HCO following 0.2 g.kg body mass (BM) NaHCO ingestion. Subsequently, on three separate occasions, participants completed a 4-km cycling TT in the heat (30 degrees centigrade; °C) (relative humidity ∼40%) following ingestion of either NaHCO (0.2 g.kg body mass), a sodium chloride placebo (0.2 g.kg BM; PLA) or no supplementation (control; CON) at the predetermined individual TTP HCO . Absolute peak [HCO ] prior to the 4-km cycling TT's was elevated for NaHCO compared to PLA (+2.8 mmol.l ; = 0.002; = 2.2) and CON (+2.5 mmol.l ; < 0.001; = 2.1). Completion time following NaHCO was 5.6 ± 3.2 s faster than PLA (1.6%; CI: 2.8, 8.3; = 0.001; = 0.2) and 4.7 ± 2.8 s faster than CON (1.3%; CI: 2.3, 7.1; = 0.001; = 0.2). These results demonstrate that NaHCO ingestion at a pre-established individual TTP HCO improves 4-km cycling TT performance in the heat, likely through enhancing buffering capacity. |
| Keywords | Alkalosis; Environmental physiology; Buffering; Supplements; Track cycling |
| Year | 2021 |
| Journal | European Journal of Sport Science |
| Journal citation | 22 (2) |
| Publisher | Wiley |
| ISSN | 1746-1391 |
| 1536-7290 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1080/17461391.2021.1998644 |
| Official URL | https://onlinelibrary.wiley.com/doi/10.1080/17461391.2021.1998644 |
| Publication dates | |
| Online | 21 Nov 2021 |
| Publication process dates | |
| Accepted | 27 Oct 2021 |
| Deposited | 08 Dec 2022 |
| Accepted author manuscript | License File Access Level Restricted |
| Publisher's version | License File Access Level Open |
| Output status | Published |
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Publisher's version
| European Journal of Sport Science - 2021 - Gough - The effects of sodium bicarbonate supplementation at individual.pdf | ||
| License: CC BY-NC 4.0 | ||
| File access level: Open | ||
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