Impact of supplementation with beetroot juice (Beta vulgaris L) on levels of malondialdehyde and antioxidant status in athletes

Strenuous physical activity can increase lipid peroxidation, which is characterized by increased levels of malondialdehyde (MDA) and decreased levels of antioxidants. It can drop the athlete's performance and health. It is possible to avoid or reduce lipid peroxidation through supplementation with antioxidants. Beetroot (Beta vulgaris L) produces different forms of natural antioxidants; however, its effectiveness still needs to be investigated. This research aimed to determine the impact of beetroot juice on the malondialdehyde concentration and antioxidant status during strenuous physical activity. The research used experimental (pre-test-post-test) using a control group. The researchers divided a total of 30 students who met the criteria into two groups (Experiment; n = 15; control; n = 15). The experimental group drank 250 mL of the juice 1 hour before training for four weeks. After the strenuous physical activity was carried out with a beep test, the researchers also checked the concentrations of MDA, TAC, and VO2max. The findings indicated a decrease in MDA concentration and an increase in TAC and VO2max to the training group that received 250 ml beet juice (p <0.05). The research concluded that beetroot juice administration during exercise could reduce malondialdehyde concentration and increase total antioxidant capacity and VO2max in athletes

Effects of Red Fruit (Pandanus Conoideus Lam) Oil on Exercise Endurance and Oxidative Stress in Rats at Maximal Physical Activity

BACKGROUND: Living cells continuously produce free radicals and reactive oxygen species (ROS) as a part of metabolic processes. These free radicals are neutralized by an antioxidant defense system. Maximal physical activity can produce an imbalance between ROS and antioxidants and thus may cause oxidative stress, which is possibly related to fatigue and tissue injury. Red fruit oil contains high beta-carotene and tocopherol as antioxidants which could overcome oxidative stress condition. AIM: The aim of this study was to determine the effect of red fruit oil on exercise endurance and oxidative stress in rats at a maximal physical activity. METHODS: Twenty-four male rats were divided into four groups. The control group (I) was administered with 1.5 ml distilled water, intervention groups (II), (III), and (IV) were administered with different doses of red fruit oil (0.15 ml/kgBW, 0.3 ml/kgBW, and 0.6 ml/kgBW, respectively). All groups were trained to swim for 4 weeks and then were forced to swim without a load until being exhausted. The malondialdehyde (MDA), glutathione peroxidase (GPx) levels, and time of swimming to exhaustion were measured in all groups. RESULT: The results showed that MDA level obtained was decreasing significantly (p < 0.05), GPx and time of swimming were increasing significantly (p < 0.05) in the intervention groups. CONCLUSION: The results suggest that red fruit oil can obviously reduce MDA level, increased GPx, and endurance and delay fatigue induced by maximal physical activity in the rat

ANTIOXIDANT AND HEPATOPROTECTIVE EFFECTS OF VIRGIN COCONUT OIL AT MAXIMUM PHYSICAL ACTIVITY

Objective: The purpose of this study was to determine the protective effects of virgin coconut oil (VCO) treatment on hepatic oxidative stress and antioxidant defenses after maximum physical activity. Methods: This study used 24 healthy male rats. The rats were divided into four groups randomly consisted of six rats in each group. The control group (P0) was given 2 mL water, the treatment groups (VCO-1, VCO-2, and VCO-4) were given VCO 1 ml/200 g BW, 2 ml/200 g BW, and 4 ml/200 g BW, respectively, per day using gavage spuit. The rats were trained to swim for a month, 30 min/day in the 1st week, 35 min/day in the 2nd week, 40 min/ day in the 3rd week, and 45 min/day in the 4th week. After 28 days, the rats were forced to perform the maximal activity by putting the rats in water with no exit. Blood samples were collected immediately after the maximum physical activity, and then, all rats were killed and liver tissues were collected. The malondialdehyde (MDA), glutathione peroxidase (GPx), and serum glutamic-oxaloacetic transaminase and serum glutamic-pyruvate transaminase level were then measured. Results: VCO increased swimming time to exhaustion, levels of GPx in the liver, which were accompanied by corresponding decreases in the MDA, alanine transaminase, and aspartate transaminase content. Conclusion: The results from this study indicate that VCO is effective in the prevention of oxidative stress following maximum physical activity

THE INFLUENCE OF RED FRUIT (PANDANUS CONOIDEUS LAM.) OIL ON GLUTATHIONE PEROXIDASE LEVEL AT MAXIMUM PHYSICAL ACTIVITY

Objectives: This study aims to see the effect of red fruit oil (RFO) on glutathione peroxidase (GPx) level at maximum physical activity.Methods: This study is an experimental research using the design of randomized control group pretest-posttest. This study was using 24 male mice divided into four groups, the control group was given aquadest, the treatment groups P1, P2, and P3 were given the RFO orally of 0.15 ml/kg BW, 0.3 ml/kg BW, and 0.6 ml/kg BW, respectively, for a month. The level of GPx was checked for all groups at the beginning of study and after the maximum physical activity. The obtained data were then tested statistically using t-test and ANOVA.Results: The result shows the RFO supplementation during exercise increased the GPx level in P1, P2, and P3 groups with p<0.05, and the higher RFO dosage resulted in higher GPx level at p<0.05.Conclusion: The conclusion of this study is the RFO could increase the level of GPx at maximum physical activity