The effects of novel ingestion of sodium bicarbonate on repeated sprint ability

Peter Miller, Amy Robinson, Andy Sparks, Craig Bridge, David Bentley, Lars McNaughton

Research output: Contribution to journalArticle

33 Citations (Scopus)
207 Downloads (Pure)


Purpose: To examine the influence of an acute dose of sodium bicarbonate (NaHCO3) on buffering capacity and performance during a repeated sprint ability (RSA) protocol. Methods: Eleven (mean ± SD: age 24.6 ± 6.1y; mass 74.9 ± 5.7kg; height 177.2 ± 6.7cm) participated in the study, undertaking four test sessions. On the first visit to the laboratory, each participant ingested 300 of NaHCO3 (in 450ml of flavoured water) and blood samples were obtained at regular intervals to determine the individual times peak pH and HCO3- response time. During the subsequent visits, participants ingested either of NaHCO3, or 270 BM of NaCI or no drink followed by a RSA cycling protocol (10 x 6s sprints with 60s recovery), which commenced at each individuals pre-determined ingestion peak pH response time. Blood samples were obtained pre-exercise, and after the 1st, 5th and 10th sprint to determine the blood pH, HCO3- and lactate (La-) responses. Results: The total work completed during the repeated sprint protocol was higher (P < 0.05) in the NaHCO3 condition (69.8 ± 11.7kJ) compared with both the control (59.6±12.2 kJ) and placebo (63.0±8.3 kJ) conditions. Peak power output (PPO) was similar (P > 0.05) between the three conditions. Relative to the control and placebo conditions, NaHCO3 ingestion induced higher (P < 0.05) blood pH and HCO3- concentrations pre-exercise and during the bouts, and higher lactate concentrations (P < 0.05) following the final sprint. Conclusion: The results from the present study suggest that NaHCO3- improves the total amount of work completed during RSA through enhanced buffering capacity.
Original languageEnglish
Pages (from-to)561-568
JournalJournal of Strength & Conditioning Research
Issue number2
Publication statusPublished - 29 Feb 2016

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