<![CDATA[This study aims to determine the effect of circuit training on improving the aerobic endurance of volleyball athletes from Bilzia Meubel Club. The research employed an experimental method using a two-group pretest-posttest design to evaluate changes in athletes’ aerobic endurance before and after the intervention. The sample consisted of 16 male athletes aged 18 years who were selected through a simple random sampling technique. The research instrument used was the bleep test, which was administered to measure the level of aerobic endurance objectively. Data were collected through pretest and posttest measurements conducted in both experimental and control groups. The obtained data were analyzed through normality and homogeneity tests to ensure data feasibility, followed by hypothesis testing using an independent sample t-test with the assistance of SPSS version 26. The results showed that the experimental group experienced a significant improvement in aerobic endurance after receiving circuit training compared to the control group. This finding is supported by a significance value of less than 0.05, indicating that circuit training has a significant effect on increasing aerobic endurance. Therefore, circuit training can be considered an effective training method to improve the physical condition and performance readiness of volleyball athletes.]]>
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