Portal de Periódicos da CAPES

Effects of Lactate Consumption on Blood Bicarbonate Levels and Performance During High-Intensity Exercise

2011; Human Kinetics; Volume: 21; Issue: 4 Linguagem: Inglês

10.1123/ijsnem.21.4.311

1543-2742

David M. Morris, Rebecca Shafer, Kimberly R. Fairbrother, Mark W. Woodall,

Cardiovascular and exercise physiology

The authors sought to determine the effects of oral lactate consumption on blood bicarbonate (HCO 3 −) levels, pH levels, and performance during high-intensity exercise on a cycle ergometer. Subjects ( N = 11) were trained male and female cyclists. Time to exhaustion (TTE) and total work were measured during high-intensity exercise bouts 80 min after the consumption of 120 mg/kg body mass of lactate (L), an equal volume of placebo (PL), or no treatment (NT). Blood HCO 3 − increased significantly after ingestion of lactate ( p < .05) but was not affected in PL or NT ( p > .05). No changes in pH were observed as a result of treatment. TTE and total work during the performance test increased significantly by 17% in L compared with PL and NT ( p = .02). No significant differences in TTE and total work were seen between the PL and NT protocols ( p = .85). The authors conclude that consuming 120 mg/kg body mass of lactate increases HCO 3 − levels and increases exercise performance during high-intensity cycling ergometry to exhaustion.