Comparison of the effect of a bout resistance exercise with and without BFR on some oxidative stress indices in middle-aged trained and untrained men
Paper ID : 1141-12THCONG
physical education and sport science-29 bahman blvd-tabriz-iran
The purpose of this study was to compare the effect of a bout of resistance exercise with and without blood flow restriction on MDA and TAC in middle-aged trained and untrained men. In a semi-experimental study, 40 middle-aged men with age range of 45-55 years old (20 persons with at least 3 years of training and 20 persons with no history of resistance training) were selected and based on the strength of 1RM in knee flexors (front leg) and leg press were matched and assigned to two groups of resistance exercise with and without blood flow restriction. Restriction of blood flow was performed using a researcher made cuff and 120% lower trunk systolic pressure was applied. The resistance exercise protocol consisted of one set of 30 repetitions and two sets of 15 repetitions of front leg and leg press with 20% of 1RM in BFR group, and 3 sets of 10 repetitions of front leg and leg press with 80% 1RM. Blood samples were taken before and immediately after completion of activity for MDA and TAC assays. Analysis of variance (ANOVA), independent t-test at <0.05 was used for data analysis by SPSS 22 software. Results showed that MDA and TAC increased in all groups and there were no significant difference between the four groups. Therefore, it can be concluded that by performing lower resistance training using BFR one can achieve similar results with heavy resistance exercise without BFR. Also, changes in oxidative indexes were similar in both trained and untrained groups.
Resistance activity; Blood flow restriction; Oxidative Stress; middle-aged men trained and untrained