<![CDATA[Suboptimal nutritional status can disrupt movement efficiency and reduce cardiorespiratory endurance in athletes, potentially hindering performance during training and competition. This study aims to analyze the relationship between Body Mass Index (BMI) and cardiorespiratory endurance (vo₂max) among athletes of the Bivota Karawang Volleyball Club. This research employed a quantitative approach with a correlational design. The sample consisted of 35 athletes (aged 15–17 years) selected through purposive sampling. BMI was measured by comparing body weight (kg) and height squared (m²), while endurance was assessed using the Multistage Fitness Test (MFT). Data analysis was performed using the Pearson Product Moment correlation test. The results showed that the majority of athletes had normal BMI (37%), followed by underweight (26%), overweight (23%), and obesity (14%). The endurance levels of athletes were predominantly in the moderate (34%) and good (29%) categories. The correlation test yielded a value of r = -0.996 with p = 0.000, indicating a very significant negative relationship between BMI and endurance. In conclusion, the higher the BMI value, the lower the cardiorespiratory endurance level of athletes. Therefore, regular monitoring of nutritional status, along with appropriate training programs and nutritional intake management, is essential to improve endurance and performance in volleyball athletes.]]>
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