Rebecca L. Jones
Warm-up intensity does not affect the ergogenic effect of sodium bicarbonate in adult men.
Jones, Rebecca L.; Stellingwerff, Trent; Swinton, Paul; Artioli, Guilherme Giannini; Saunders, Bryan; Sale, Craig
Authors
Trent Stellingwerff
Dr Paul Swinton p.swinton@rgu.ac.uk
Associate Professor
Guilherme Giannini Artioli
Bryan Saunders
Craig Sale
Abstract
This study determined the influence of a high- (HI) versus low-intensity (LI) cycling warm-up on blood acid-base responses and exercise capacity following ingestion of sodium bicarbonate (SB; 0.3 g/kg body mass) or a placebo (PLA; maltodextrin) 3 hr prior to warm-up. Twelve men (21 ± 2 years, 79.2 ± 3.6 kg body mass, and maximum power output [Wmax] 318 ± 36 W) completed a familiarization and four double-blind trials in a counterbalanced order: HI warm-up with SB, HI warm-up with PLA, LI warm-up with SB, and LI warm-up with PLA. LI warm-up was 15 min at 60% Wmax, while the HI warm-up (typical of elites) featured LI followed by 2 × 30 s (3-min break) at Wmax, finishing 30 min prior to a cycling capacity test at 110% Wmax. Blood bicarbonate and lactate were measured throughout. SB supplementation increased blood bicarbonate (+6.4 mmol/L; 95% confidence interval, CI [5.7, 7.1]) prior to greater reductions with HI warm-up (-3.8 mmol/L; 95% CI [-5.8, -1.8]). However, during the 30-min recovery, blood bicarbonate rebounded and increased in all conditions, with concentrations ∼5.3 mmol/L greater with SB supplementation (p < .001). Blood bicarbonate significantly declined during the cycling capacity test at 110% Wmax with greater reductions following SB supplementation (-2.4 mmol/L; 95% CI [-3.8, -0.90]). Aligned with these results, SB supplementation increased total work done during the cycling capacity test at 110% Wmax (+8.5 kJ; 95% CI [3.6, 13.4], ∼19% increase) with no significant main effect of warm-up intensity (+0.0 kJ; 95% CI [-5.0, 5.0]). Collectively, the results demonstrate that SB supplementation can improve HI cycling capacity irrespective of prior warm-up intensity, likely due to blood alkalosis.
Citation
JONES, R.L., STELLINGWERFF, T., SWINTON, P., ARTIOLI, G.G., SAUNDERS, B. and SALE, C. 2021. Warm-up intensity does not affect the ergogenic effect of sodium bicarbonate in adult men. International journal of sport nutrition and exercise metabolism [online], 31(6), pages 482-489. Available from: https://doi.org/10.1123/ijsnem.2021-0076
Journal Article Type | Article |
---|---|
Acceptance Date | Sep 3, 2021 |
Online Publication Date | Sep 3, 2021 |
Publication Date | Nov 30, 2021 |
Deposit Date | Oct 20, 2021 |
Publicly Available Date | Oct 20, 2021 |
Journal | International journal of sport nutrition and exercise metabolism |
Print ISSN | 1526-484X |
Electronic ISSN | 1543-2742 |
Publisher | Human Kinetics |
Peer Reviewed | Peer Reviewed |
Volume | 31 |
Issue | 6 |
Pages | 482-489 |
DOI | https://doi.org/10.1123/ijsnem.2021-0076 |
Keywords | Buffering; Supplementation; Sports; Cycling; High intensity; Low intensity |
Public URL | https://rgu-repository.worktribe.com/output/1500040 |
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