alexa Oxidative stress and DNA damage in older adults that do exercises regularly.
Toxicology

Toxicology

Journal of Clinical Toxicology

Author(s): Mergener M, Martins MR, Antunes MV, da Silva CC, Lazzaretti C,

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Abstract OBJECTIVES: Free radicals may damage lipids, proteins and DNA, which may lead to critical diseases in the aging. This work evaluated levels of malondialdehyde (MDA), glutathione peroxidase (GPx) and DNA damage by comet assay (SCGE) in older adults that do exercises regularly. DESIGN AND METHODS: 110 females, aged 66.3+/-8 years were divided into sedentary (n=54), walking (n=36) and muscle building (n=20) groups. Levels of MDA, GPx and SCGE were measured in venous blood before and after exercise. RESULTS: MDA levels were higher (P<0.005) and GPx levels were lower (P<0.005) in active groups than in sedentary group. SCGE index after physical activity was greater than at baseline (muscle building: P=0.004; walking: P=0.002). CONCLUSIONS: Exercise reduces the diseases risk, but may promote the production of free radicals. It remains unclear whether cell adaptations responsible for health benefits are associated with such events. However we may suggest the existence of a different biochemical pattern for older adults that do exercise regularly. This article was published in Clin Biochem and referenced in Journal of Clinical Toxicology

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