ABSTRACT
Intensive and acute exercise trainings may induce oxidative stress, but antioxidant supplements may attenuate its degenerative consequences. The aim of this research was to examine the effect of green tea supplementation on the oxidative stress indices after an intensive resistance training session. 40 non-athletes [without regular physical activity] women were randomly divided into 4 equal [n=10] groups including green tea supplementation, green tea supplementation plus resistance training, resistance training, and control groups. After supplementation period [600 mg/day, 14 days], resistance training and green tea supplementation plus resistance training groups performed an intensive resistance training session at 75-85% of one repetition maximum. The malondialdehyde and total thiol were measured as oxidative stress indices. Data were analyzed by using of repeated measure ANOVA and LSD tests at p<0.05. Results showed that after 14 days of green tea consumption, malondialdehyde significantly decreased in green tea supplementation [p=0.03] and green tea supplementation plus resistance training [p=0.01] groups, while total thiol increased significantly [p=0.01] in two green tea supplementation groups. However, an intensive resistance training session increased malondialdehyde [p=0.01] without any significantly changes in total thiol [p=0.42]. It seems that green tea supplementation can inhibit exercise-induced protein and lipid oxidation in non-athletes women via enhancement of antioxidant defense system of the body
ABSTRACT
Background and Aim: Nonalcoholic fatty liver disease is the most common cause of abnormal liver enzymes. We aimed to investigate the effects of resistance and combined exercise on levels of liver enzymes in women with fatty liver disease
Materials and Methods: In this study, 37 women were assigned into three groups including control, resistance and combined exercise groups. Resistance exercise protocol included 8 movements, 3 sets, 8-10 repetitions which performed at%60-75 of one repetition maximum¡ 3 times per week for 8 weeks. Combined exercise included 4 resistance movement in the first half of training session and the aerobic exercise at intensity of%60-75 maximum heart rate in the other half. The AST, ALT and ALP were measured using biochemical methods. Paired t-test results for the extraction of one-way ANOVA, at a significant level of 0/05 were analysed
Results: The level of ALP only in the resistance exercise group significantly decreased [p=0.03], but AST and ALT levels did not significantly change in any groups [p>0.05]. The mean of ALT/AST ratio significantly increased in the resistance exercise group [p =0.04], but no significant changes were observed in the combination and control groups. The mean of flexibility [p=0.001], maximal oxygen consumption [p=0.02], muscle strength [p=0.003] and grip strength [p=0.001], significantly increased after resistance exercise
Conclusion: None of the resistance and combined exercises had significant effect on the levels of AST and ALT, but the resistance exercise improved ALP and fitness indicators. Therefore, resistance exercise may be more favorite for fatty liver patients
ABSTRACT
Visfatin, a novel adipokine, was revealed to be associated with obesity, but its role in response to exercise training in human is not known. The purpose of this study was to assess the effects of aerobic and resistance training on plasma visfatin in overweight women. Thirty-eight overweight volunteer women [age 34.84 +/- 5.70 y, body mass index 28.82 +/- 3.65 kg/m2, body fat percent 36.34 +/- 3.39% and waist-hip ratio 0.85 +/- 0.04 [means +/- SD]] were randomly divided into 3 groups. 14 subjects participated in an aerobic exercise training [50 min/day, 80-85% heart rate-reserve, 4 days/week], 14 subjects participated in a resistance exercise training [50 min/day, 60-70% 1-RM, 4 days/week], and 10 overweight women were served as control. Fasting blood samples were collected to assess changes in plasma visfatin, insulin and glucose levels before and after 2 months of the training program. Findings indicated a lower and significant [P<0.05] post-training change in circulating levels of visfatin and insulin in the resistance training group as compared with the other groups. Body mass index, waist-hip ratio, and%body fat were significantly decreased [P<0.001] in experimental groups as compared with control group. The resistance exercise training-induced reduction of plasma visfatin is most likely the result of weight loss and body composition changes in overweight women