The Effects of Two Different Doses of Calcium Lactate on Blood pH, Bicarbonate, and Repeated High-Intensity Exercise Performance

Autor(es)

Painelli, Vitor de Salles ^[1] ; da Silva, Rafael Pires ^[1] ; de Oliveira Junior, Odilon Marques ^[1] ; de Oliveira, Luana Farias ^[1] ; Benatti, Fabiana Braga ^[1] ; Rabelo, Tobias ^[1] ; Limongi Franca Guilherme, Joao Paulo ^[1] ; Lancha Junior, Antonio Herbert ^[1] ; Artioli, Guilherme Giannini ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Lab Appl Nutr & Metab, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF SPORT NUTRITION AND EXERCISE METABOLISM; v. 24, n. 3, p. 286-295, JUN 2014.
• Citações Web of Science: 4

Resumo

We investigated the effects of low- and high-dose calcium lactate supplementation on blood pH and bicarbonate (Study A) and on repeated high-intensity performance (Study B). In Study A, 10 young, physically active men (age: 24 +/- 2.5 years; weight: 79.2 +/- 9.45 kg; height: 1.79 +/- 0.06 m) were assigned to acutely receive three different treatments, in a crossover fashion: high-dose calcium lactate (HD: 300 mg.kg(-1) body mass), low-dose calcium lactate (LD: 150 mg.kg(-1) body mass) and placebo (PL). During each visit, participants received one of these treatments and were assessed for blood pH and bicarbonate 0, 60, 90, 120, 150, 180, and 240 mm following ingestion. In Study B, 12 young male participants (age: 26 +/- 4.5 years; weight: 82.0 +/- 11.0 kg; height: 1.81 +/- 0.07 m) received the same treatments of Study A. Ninety minutes after ingestion, participants underwent 3 bouts of the upper-body Wingate test and were assessed for blood pH and bicarbonate 0 and 90 min following ingestion and immediately after exercise. In Study A, both BD and LD promoted slight but significant increases in blood bicarbonate (31.47 +/- 1.57 and 31.69 +/- 1.04 mmol.L-1, respectively) and pH levels (7.36 +/- 0.02 and 7.36 +/- 0.01, respectively), with no effect of PL. In Study B, total work done, peak power, mean power output were not affected by treatments. In conclusion, low- and high-dose calcium lactate supplementation induced similar, yet very discrete, increases in blood pH and bicarbonate, which were not sufficiently large to improve repeated high-intensity performance. (AU)

• Processo FAPESP: 11/17059-2 - Efeito da suplementação de beta-alanina combinada ou não com bicarbonato de sódio sobre o desempenho anaeróbio intermitente
• Beneficiário: Guilherme Giannini Artioli
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/04806-0 - Efeitos de 12 semanas de treinamento intermitente de alta intensidade sobre as concentrações intramusculares de carnosina
• Beneficiário: Vitor de Salles Painelli
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/22516-6 - Perfil poligênico de atletas brasileiros: distribuição de polimorfismos associados ao desempenho físico
• Beneficiário: João Paulo Limongi França Guilherme
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 10/11221-0 - Elevação artificial da capacidade tamponante muscular: efeitos sobre o desempenho, função e mecanismos relacionados
• Beneficiário: Antonio Herbert Lancha Junior
• Modalidade de apoio: Auxílio à Pesquisa - Regular