Correlation between Body Mass Indexs (BMI), Leg flexibility and dynamic balance in adolescent judo athletes in Surabaya

Background: Judo is a combat sport that requires a combination of strength, flexibility, and balance. Dynamic balance is crucial for maintaining stability during movement, while leg flexibility enhances an athlete's ability to execute various techniques effectively. Both physical attributes are essential for judo athletes to optimize performance, prevent injuries, and maintain control during matches, and they are often associated with Body Mass Index (BMI) or an athlete's body composition. Objective: To examine the correlation between Body Mass Index (BMI), leg flexibility, and dynamic balance in adolescent judo athletes in Surabaya. Methods: This study used an analytical cross-sectional research design to analyze relationships. BMI measurements were conducted by measuring height and weight, leg flexibility was assessed using the Sit and Reach Test, and dynamic balance was evaluated using the Star Excursion Balance Test (SEBT). Data analysis was performed using IBM SPSS 25.0, with normality tests conducted using the Shapiro-Wilk test and correlation analysis using Pearson's test. Results: The correlation between BMI and leg flexibility, analyzed using Pearson's correlation test, showed a p-value of 0.313 (p>0.05), while the correlation between BMI and dynamic balance yielded a p-value of 0.217 (p>0.05). Conclusion: No significant relationship was found between BMI, leg flexibility, and dynamic balance.