Efeito da suplementação com extrato de chá verde sobre o dano muscular e dor muscular de início tardio

Abstract

Green tea extracts supplementation (GT) is recognized as a source of antioxidants and anti-inflammatory substances that may contribute to the recovery after intense exercise when muscle soreness (MS) occurs. In this study we determine the effects of GT on MS, muscle damage, oxidative stress and antioxidant status. Here we present a randomized trial triple blind placebo control including 20 adults aged 25 (5) years and physically active that underwent sessions exercise for induction of muscle damage in the triceps sural before and after 15 days of supplementation with GT at dose of 500 mg/day (GT, n=10) or placebo (PL, n=10). MS was determined using a visual analogic scale. Blood samples were collected to determination of biochemical markers of damage considering activity of creatine kinase (CK) and lactate dehydrogenase (LDH), oxidative stress considering levels of malondialdehyde (TBARS), reactive species of oxygen (DCFH), protein carbonylation, and antioxidant status considering total antioxidant capacity (FRAP), glutathione activity (GSH), and acetylcholinesterase (AChE) activity. Exercise induced MS and GT reduces a marker of structural muscle damage without effects on oxidative stress and antioxidant status. This protective effect may be support the use of this supplementation as a possible correlate strategy to prevent muscle damage and therefore contribute to the recovery of intense exercise.