Acute LED irradiation does not change the anaerobic capacity and time to exhaustion during a high-intensity running effort: a double-blind, crossover, and placebo-controlled study

Autor(es)

Malta, Elvis De Souza ; Bonetti De Poli, Rodrigo Araujo ; Pinheiro Brisola, Gabriel Motta ; Milioni, Fabio ; Miyagi, Willian Eiji ; Machado, Fabiana Andrade ; Zagatto, Alessandro Moura

• Tipo de documento: Artigo Científico
• Fonte: Lasers in Medical Science; v. 31, n. 7, p. 1473-1480, SEP 2016.
• Citações Web of Science: 3

Resumo

The purpose of this study was to investigate the acute effects of photobiomodulation therapy using cluster light-emitting diodes (LEDT; 104 diodes) (wavelength 660 and 850 nm; energy density 1.5 and 4.5 J/cm(2); energy 60 J at each point; total energy delivered 600 J) on alternative maximal accumulated oxygen deficit (MAOD(ALT)) and time to exhaustion, during a high-intensity running effort. Fifteen moderately active and healthy males (age 25.1 +/- 4.4 years) undenvent a graded exercise test and two supramaximal exhaustive efforts at 115 % of the intensity associated with maximal oxygen uptake performed after acute LEDT or placebo irradiation in a double-blind, crossover, and placebo controlled study design. The MAOD(ALT) was assumed as the sum of both oxygen equivalents estimated from the glycolytic and phosphagen metabolism pathways during each supramaximal effort. For the statistical analysis, a paired t test was used to determine differences between the treatments. The significance level was assumed as 95 %. In addition, a qualitative analysis was used to determine the magnitude of differences between groups. No significant differences were found for the values of oxygen equivalents from each energetic metabolism (P >= 0.28). for MAOD(ALT) values between the LEDT and placebo conditions (P >= 0.27), or for time to exhaustion (P = 0.80), except for the respiratory exchange ratio (P = 0.01). The magnitude-based inference of effect size reported only a possibly negative effect of photobiomodulation on MAOD(ALT) when expressed in units relative to body mass and on the glycolysis pathway (26 0,4). In summary, LEDT after a high-intensity running effort did not alter the MAOD(ALT), metabolic energy pathways, or high-intensity running performance. (AU)

• Processo FAPESP: 16/02683-6 - Influência da suplementação de beta-alanina associado ao treinamento intervalado de alta intensidade no desempenho de sprints repetidos.
• Beneficiário: Fabio Milioni
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 15/05012-2 - Efeito da LED terapia sobre a recuperação muscular após sessões de treinamento intervalado de alta intensidade
• Beneficiário: Elvis de Souza Malta
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 13/12940-8 - Determinação do déficit máximo de oxigênio acumulado por meio de uma única sessão de esforço supramáximo: análise da reprodutibilidade, influência do ergômetro e intensidade de esforço
• Beneficiário: Alessandro Moura Zagatto
• Modalidade de apoio: Auxílio à Pesquisa - Regular