The influence of oxidative stress in subjects submitted to aerobic exercise

• Published in: Revista de Educaco Fisica Vol. 130; no. 1; pp. 22 - 28
• Main Authors: Pereira, A T, Cunha, AGA, Guedes, CJJ, da Rosa, FS, Cechin, L S, Silveira, MDS, Azevedo, M F, de Araujo, PC, Machado, RPA, Buck, KH, Pereira, E J, Eleutherio, ECA, Martins, MEDA, Pinheiro-DaCunha, R S, La Porta, MADM
• Format: Journal Article
• Language: Portuguese
• Published: 01.01.2005
• ISSN: 0102-8464

The human body, when submitted to physical activity, increases the speed of the mitochondrial breathing in the active muscles, which leads to an electron extravasation of the mitochondrias and to the formation of active species of oxygen (EAO)/radicals free of oxygen (RLO). provoking the development of illnesses, fatigue and injuries of the tissues, that can be measured indirectly by lipid peroxidation (LP). The objective of the study was to compare oxidative stress, through LP, between individuals with levels of VO sub(2) Max considered below average and excellent, when submitted to a continuous race of 40 minutes 67.5% of the VO sub(2) Max. 18 individuals divided into 02 (two) groups participated in the sample: G1 (considered below average) composed for 10 (ten) individuals; and G2 (considered excellent) composed for 08 (eight) individuals. The Leger-Boucher test was used to measure and separate the sample in terms of VO sub(2) Max. On the following day, the individuals ran a continuous race of 40 minutes 67.5% of the VO sub(2) Max and samples of plasma were analyzed before and after exercise. Despite the results showing that statistically there was not a significant difference inter-groups and intra-groups (F=1,2417 for p=0.28161), there were indications that differences existed between the groups. It was evident that LP presented normal distribution. The homogenity of the samples was verified, which presented (p=0,10) for lipid peroxidation. The ANOVA two way test was used which did not present significant difference between before exercise and after exercise, intra-groups and inter-groups (F=1,2417 for p=0.28161) for lipid peroxidation. From the analysis of the inter-group and intra-group results it was concluded that there was not significant difference for LP, or that after exercise G1 and G2 presented the same levels of oxidative stress.