Food supplementation prior to exercise could supply glucose for energy booster and enhanced performance. Food supplements with potent antioxidant activity could also help alleviate oxidative stress formation during exercise. This study aiming to investigate yellow watermelon-plantain juice administration prior to anaerobic exercise on blood glucose level and its protective effect on markers of oxidative stress formation that is malondialdehyde (mda) serum level. Thirty-five male Sprague Dawley rats were divided into five different groups in which received different treatments. Anaerobic exercise in this study was set as swimming test for three minutes. Blood glucose level were examined as baseline, thirty minutes after juice supplementation, and after exercise test. P2 groups has the highest blood glucose level before and after exercise (111.86 mg/dl and 100.52 mg/dl, respectively). Mda level after exercise differ significantly between groups (p < 0.05) with negative control group has the highest level of Mda (7.68 nmol/ml) and P2 has the lowest level among treatment groups (1.8 nmol/ml). It can be concluded that yellow watermelon-plantain juice supplementation prior to anaerobic exercise is an effective source of energy due to its rapid glucose availability in the serum. Antioxidant content in yellow watermelon-plantain juice could also suppressed malondialdehyde serum level after exercise

Plantains are high in potassium and glucose, while yellow watermelons are high in citrulline, antioxidants and fluids. The combination juice of plantain and yellow watermelon provides glucose and fluids, suppresses lactic acid and muscle inflammation, so will improve endurance during aerobic exercise. The aim of this study was to determine the effect of combining juices of yellow watermelon plantains on aerobic swimming endurance in Sprague-Dawley rats. The design of this study was true experimental and used a post-test only with a controlled group. The 21 male Sprague Dawley rats, were divided into three groups, the control (K), which were given one dose of juice (P1) and two doses (P2). Rats were observed for the length of swimming. One-Way Anova and Post-Hoc LSD were used to analyze the data. The results of this study found that on average P2 with a double dose of juice had a longer swim. The P1 swim 390,57 seconds longer than control, while P2 swim 757,57 seconds longer than control, while P2 could swim 367 seconds longer than P1. There was a difference in swim length (p < 0,001) in each group after intervention with variation doses. The conclusion was that there was a difference in endurance in each group after receiving a combined juice with variation doses.