Metabolic and Exercise Performance Responses to Two Different Oral Doses of Calcium Lactate
- *Corresponding Author:
- David Morris
Department of Kinesiology
University of Texas of the Permian Basin
Mesa Building, Rm. 3152 4901
East University Blvd. Odessa, TX, USA, 79762-0001
E-mail: [email protected]
Received Date: December 19, 2016; Accepted Date: December 27, 2016; Published Date: December 30, 2016
Citation: Morris DM, Beloni RK, Wofford H, Roslanova E (2016) Metabolic and Exercise Performance Responses to Two Different Oral Doses of Calcium Lactate. Sports Nutr Ther 1: 117. doi: 10.4172/2473-6449.1000117
Copyright: © 2016 Morris DM, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
We investigated the effects of two different oral doses of lactate on blood lactate, bicarbonate (HCO3-) and pH levels and performance of high-intensity exercise in endurance-trained, competitive cyclists. Twelve subjects consumed 120 (L120) or 300 mg lactate/kg bm (L300) or placebo (PL) 80 min prior to performing an exercise performance test consisting of five high-intensity efforts followed by a timed, high-intensity effort to exhaustion. Seventy minutes following lactate ingestion, blood HCO3- increased in L120 by 10% (p=0.03) and in L300 by 9% (p=0.02) with no significant difference observed between lactate treatments (p=0.74). No significant change in blood HCO3- was seen following consumption of PL (- 0.1%, p=0.98). Blood lactate increased by 27% in L300 (p=0.02) with no significant changes in response to PL or L120. No changes in pH were observed due to treatment. Time to exhaustion in the performance test was increased by 14% in L120 (p=0.004) and 26% in L300 (p=0.001) when compared to PL. There was no significant difference in time to exhaustion between the lactate treatments (p=0.09). Consumption of 120 or 300 mg lactate/kg bm by endurance-trained subjects increased blood HCO3- and improved exercise performance during high-intensity exercise bouts of approximately 150–180 s. However, consuming 300 mg lactate/kg bm provided no clear ergogenic effect compared to consuming 120 mg lactate/kg bm.