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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Author(s):
Malta, Elvis De Souza ; Bonetti De Poli, Rodrigo Araujo ; Pinheiro Brisola, Gabriel Motta ; Milioni, Fabio ; Miyagi, Willian Eiji ; Machado, Fabiana Andrade ; Zagatto, Alessandro Moura
Total Authors: 7
Document type: Journal article
Source: Lasers in Medical Science; v. 31, n. 7, p. 1473-1480, SEP 2016.
Web of Science Citations: 3
Abstract

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)

FAPESP's process: 16/02683-6 - Influence of beta-alanine supplementation associated with high-intensity interval training on performance of repeated sprints.
Grantee:Fabio Milioni
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/12940-8 - Maximal accumulated oxygen deficit determination using a single supramaximal exercise effort: analysis of reproducibility and influence of exercise mode and exercise intensity
Grantee:Alessandro Moura Zagatto
Support type: Regular Research Grants
FAPESP's process: 15/05012-2 - Effect of led therapy on the muscular recovery after high-intensity interval training session
Grantee:Elvis de Souza Malta
Support type: Scholarships in Brazil - Master