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)

Abstract

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 mg.kg-1 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 300mg.kg-1 of NaHCO3, or 270 mg.kg-1 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
Volume30
Issue number2
DOIs
Publication statusPublished - 29 Feb 2016

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