Journal article
Influence of Sodium Bicarbonate on Performance and Hydration in Lightweight Rowing
International Journal of Sports Physiology and Performance, Vol.17(1), pp.11-18
2012
PMID: 21941012
Abstract
Purpose: The effect of sodium bicarbonate (NaHCO3) ingestion on prerace hydration status and on 2000 m ergometer performance in elite lightweight rowers was examined using a randomized, cross-over, double- blinded design. Methods: To simulate body mass (BM) management strategies common to lightweight rowing, oarsmen reduced BM by approx. 4% in the 24 h preceding the trials, and, in the 2 h before performance, undertook nutritional recovery consisting of mean 43.2 kJ/kg, 2.2 g of CHO per kilogram, 31.8 mg of Na+ per kilogram, 24.3 mL of H2O per kilogram, and NaHCO3 (0.3 g of NaHCO3 per kilogram BM) or placebo (PL; 0.15 g of corn flour per kilogram BM) at 70 to 90 min before racing. Results: At 25 min before performance, NaHCO3 had increased blood pH (7.48 ± 0.02 vs PL: 7.41 ± 0.03, P = .005) and bicarbonate concentrations (29.1 ± 1.8 vs PL: 23.9 ± 1.6 mmol/L, P < .001), whereas BM, urine specific gravity, and plasma volume changes were similar between trials. Rowing ergometer times were similar between trials (NaHCO3: 397.8 ± 12.6; PL: 398.6 ± 13.8 s, P = .417), whereas posttest bicarbonate (11.6 ± 2.3 vs 9.4 ± 1.8 mmol/L, P = .003) and lactate concentration increases (13.4 ± 1.7 vs 11.9 ± 1.9 mmol/L, P = .001) were greater with NaHCO3. Conclusion: Sodium bicarbonate did not further enhance rehydration or performance in lightweight rowers when undertaking recommended post-weigh-in nutritional recovery strategies.
Details
- Title
- Influence of Sodium Bicarbonate on Performance and Hydration in Lightweight Rowing
- Authors
- P D Kupcis (Author) - Australian Catholic UniversityGary J Slater (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringC L Pruscino (Author) - Victorian Institute of SportJ G Kemp (Author) - Australian Catholic University
- Publication details
- International Journal of Sports Physiology and Performance, Vol.17(1), pp.11-18
- Publisher
- Human Kinetics
- Date published
- 2012
- DOI
- 10.1123/ijspp.7.1.11
- ISSN
- 1555-0265
- PMID
- 21941012
- Copyright note
- Copyright © 2012 Human Kinetics. Reproduced here in accordance with the publisher's copyright policy.
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Health - Nutrition & Dietetics; School of Health and Sport Sciences - Legacy; School of Health and Behavioural Sciences - Legacy
- Language
- English
- Record Identifier
- 99449761602621
- Output Type
- Journal article
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- Collaboration types
- Domestic collaboration
- Web Of Science research areas
- Physiology
- Sport Sciences