Background: Football as a high-intensity sport that causes fluid loss in the body often makes athletes dehydrated which results in decreased athlete performance. Provision of adequate and appropriate drinks can prevent dehydration. Watermelon rind contains high potassium which can restore lost body fluids.Objectives: Conducted a study to determine the correlation of giving watermelon rind juice to the hydration status of athletes in the Student Football Activity Unit.Methods: The study was conducted with a quasi-experimental design with a pre-posttest without control group design. A sample of 18 soccer athletes was taken using a purposive sampling technique. Subjects were given 300 ml of watermelon rind juice for 7 days. Hydration status was obtained based on the results of urine specific gravity examination. Measurement of hydration status wasconductedbefore and after the intervention period. The research instruments were urine samples analyzed in the laboratory, SOPs for making watermelon rind juice, observation sheets for giving juice, SOPs for measuring hydration status, and hydration status observation sheets. Data analysis using Wilcoxon test.Results: Specific gravity of pretest urine obtained a median of 1.025 g/dl (min-max 1.005-1.030 g/dl). Posttest urine specific gravity received a median of 1.025 g/dl (min-max 1.010-1.031 g/dl). There was an average decrease in urine specific gravity of 0.0019 g/dl at the posttest. The results of the pretest and posttest bivariate analysis obtained a p-value of 0.391.Conclusion: There is no significant effect of watermelon rind juice on the hydration status of athletes in the Student Football Activity Unit. There is a decrease in the average specific gravity of urine after being given watermelon rind juice