This study aims to determine the effect of beetroot juice on hemoglobin levels and the VO2Max value of an athlete. This research is an experimental study using a true experimental design with a pretest-posttest control group design approach. This study used 36 badminton athletes divided into 3 groups. The results showed that there were significant differences in hemoglobin levels in badminton athletes after consuming beetroot juice, the 200 ml beetroot juice group (p = 0.001), the 300 ml beetroot juice group (p = 0.002). There was a difference in the levels of Hemoglobin in badminton athletes after treatment between consuming 200 ml beetroot juice and a group consuming 300 ml beetroot juice but not significant (p = 0.744> p = 0.05). There were significant differences in VO2Max values after consumption of beetroot juice in the 300 ml group (p = 0,000), but there were no significant differences in VO2Max values in the control group (p = 0.007) and the 200 ml group (p = 0.007). There was a significant difference in the value of VO2Max badminton athletes between the group consuming 200 ml beetroot juice and the group consuming 300 ml beetroot juice after treatment (p = 0.031 <p = 0.005). Beetroot juice can be highly recommended for athletes to maintain stamina in optimal conditions.