Gleadall-Sidall, D. O., Midgley, A. W., & Siegler, J. C. (June 03, 2010). Sodium bicarbonate ingestion and repeated swim sprint performance. Presentation 1923 at the 2010 Annual Meeting of the American College of Sports Medicine, Baltimore, Maryland; June 2-5.

red line

This study observed the ergogenic potential of 0.3 g/kg of sodium bicarbonate (NaHCO3) in competitive, non-elite swimmers using a repeated swim sprint design that eliminated the technical component of turning. Swimmers (M = 6; F = 8) completed two trial conditions sodium bicarbonate ingestion and sodium chloride (salt - placebo) ingestion each separated by one week. Ss were paired according to ability and completed eight, 25-m front crawl maximal effort sprints each separated by five seconds. Blood acid-base status was assessed pre-ingestion, pre- and post-swim via capillary finger sticks, and total swim time was calculated as a performance measure.

Total swim time was significantly decreased (~-2%) in the sodium bicarbonate treatment compared to placebo condition. Blood analysis revealed significantly elevated blood buffering potential pre-swim along with a significant decrease in extracellular K+ in the sodium bicarbonate condition.

Implication. Sodium bicarbonate ingested 2.5 hours before swimming exercise enhances blood buffering potential, and positively influences performance.

Return to Table of Contents for this issue.

red line