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Vegan diets are virtually absent in carnosine, which may result in reduced buffering capacity and performance during sprint interval exercise. Thus, vegans might be more benefited by ingestion of an extracellular buffer for improving sprint performance than omnivores. In the present study, we investigated the effects of sodium bicarbonate (NaHCO3 -) ingestion on performance during a sprint interval exercise in vegans and omnivores. Ten (five males and five females) vegans and nine (four males and five females) omnivores performed four 30-second sprints (5-minute rest between sprints) after ingesting either placebo (cellulose) or NaHCO3 - (0.1·kg-1 body mass at 120, 90 and 60 minutes prior exercise). There was a higher peak and mean power in bout 1 and 2 than bouts 3 and 4 (main effect of sprint, p = .001). However, NaHCO3 - ingestion had no effect on peak and mean power during the four sprints in both vegans and omnivores groups (main effect of condition, p = .590 and 0.443). There were also no differences in sprint performance between groups (main effect of group, p = .621 and p = .902). In conclusion, acute ingestion of sodium bicarbonate does not improve performance during sprint interval exercise in both vegans and omnivores.
Cite this article as: Henrique Marinho, A., Pfeiffer, A., Tomazini, F., Juan Senoski, S., Giannini Artioli, G., Bertuzzi, R., & Eduardo Lima-Silva, A. (2023). Sodium bicarbonate supplementation does not improve repeated sprint performance in vegans and omnivores. Research in Sports Science, 13(1), 17-22.