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Responses to sodium bicarbonate supplementation in repeat sprint activity are individual

Haug, William B., Nibali, Maria L., Drinkwater, Eric J., Zhang, Ann and Chapman, Dale W. 2014, Responses to sodium bicarbonate supplementation in repeat sprint activity are individual, Medicina sportiva, vol. X, no. 4, (No. 40), pp. 2434-2440.

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Title Responses to sodium bicarbonate supplementation in repeat sprint activity are individual
Author(s) Haug, William B.
Nibali, Maria L.
Drinkwater, Eric J.ORCID iD for Drinkwater, Eric J. orcid.org/0000-0002-9594-9360
Zhang, Ann
Chapman, Dale W.
Journal name Medicina sportiva
Volume number X
Issue number 4
Season (No. 40)
Start page 2434
End page 2440
Total pages 7
Publisher Romanian Sports Medicine Society
Place of publication Bucharest, Romania
Publication date 2014
ISSN 1841-0162
Keyword(s) short track
sodium bicarbonate
repeat sprint
Summary The aim of this study was to determine the individual effects of acute sodium bicarbonate (NaHCO3) supplementation on elite short track speed skating relay race simulation.

Material and Method. Double-blindedbalanced, cross-over investigation required two teams of 4 athletes from the Australian National Short Track Speed Skating Program to participate in 2 simulated relay races 72 h apart. Each athlete performed 7 maximal speed skating sprints at a work:rest ratio of ~1:4. Each athlete ingested either 0.3g.kg-1 per body mass of NaHCO3 or lactose placebo (P) 75 min prior to each race. Plasma blood lactate concentration (Bla) was recorded 10min pre- and 2 min post- race simulation. Race lap times and changes in Bla were log transformed and analyzed using paired sample t-tests between NaHCO3 and P. Data were also, analysed to evaluate individual response. Magnitudes of differences between conditions were interpreted using effect sizes (ES) and 90% confidence limits (CL).

Results. Post-race simulation, Bla concentration demonstrated a very large increase from baseline for both groups. P demonstrated substantially faster performance for overall (ES: 0.98, CL: -0.13 to 1.82), mean lap (ES: 1.59, CL: 0.22 to 2.95), and fastest lap time (ES: 1.26, CL: 0.02 to 2.50) compared to NaHCO3. Interpretation of the individual analysis indicates that NaHCO3 results in a greater magnitude of individual variation for total (ES: 1.05, CL: -0.40 to 1.54), mean (ES: 2.04, CL: 0.71 to 2.79), and fastest lap time (ES: 1.85, CL: 0.64 to 2.54) than P.

Conclusion. These findings indicate responses to acute NaHCO3 supplementation may be individual.
Language eng
Field of Research 111101 Clinical and Sports Nutrition
Socio Economic Objective 929999 Health not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2014, Medicina Sportiva
Persistent URL http://hdl.handle.net/10536/DRO/DU:30083263

Document type: Journal Article
Collection: School of Exercise and Nutrition Sciences
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