title: Effects of lactate consumption on blood bicarbonate levels and performance during high-intensity exercise.
abstract: 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.
authors.affiliation: Dept. of Health, Leisure, and Exercise Science, Appalachian State University, Boone, NC, USA.
authors.forename: David M
authors.initials: DM
authors.lastname: Morris
authors.forename: Rebecca S
authors.initials: RS
authors.lastname: Shafer
authors.forename: Kimberly R
authors.initials: KR
authors.lastname: Fairbrother
authors.forename: Mark W
authors.initials: MW
authors.lastname: Woodall
mesh_terms: D000328:Adult; D001639:Bicarbonates / Q000097:blood*; D017610:Calcium Compounds / Q000008:administration & dosage* / Q000097:blood; D018592:Cross-Over Studies; D004311:Double-Blind Method; D015444:Exercise; D005080:Exercise Test / Q000379:methods*; D005260:Female; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007773:Lactates / Q000008:administration & dosage* / Q000097:blood; D008297:Male; D055815:Young Adult
chemical_list: D001639:Bicarbonates; D017610:Calcium Compounds; D007773:Lactates; C110051:calcium lactate