to sodium bicarbonate supplementation in repeat sprint activity are
William B. Haug1,2,3,
Maria L. Nibali2, Eric J. Drinkwater4,
Ann Zhang3 and Dale W. Chapman1,3,4
Institute of Sport, Australian Capital Territory, Australia,
of Human Movement Studies, Charles Sturt University, Bathurst,
3Australian Short Track
Skating Team, Olympic Winter Institute of Australia, Melbourne,
4School of Exercise and
Health Science, Edith Cowan University, Joondalup, Australia
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-blinded balanced, 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 analysed 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).
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.
bicarb, sodium bicarbonate, repeat sprintFull
Responses to sodium bicarbonate supplementation in repeat sprint activity are individual