Correlation Between Body Mass Index (BMI) and 100 Meter Running Speed of Students of SMP Negeri 20 Makassar

The level of physical fitness of school students, especially in sprint activities such as the 100-meter run, is often associated with body status as measured by the Body Mass Index (BMI). This study aims to analyze the relationship between BMI and 100-meter running speed in students of SMP Negeri 20 Makassar. This study used a quantitative correlational method with a test and measurement approach to 30 students aged 12–14 years. Data were collected through height and weight measurements to calculate BMI, as well as a 100-meter run test to measure speed. Data analysis using Pearson correlation showed a very significant negative relationship between BMI and running time (r = 0.918, p < 0.001). These results indicate that students with higher BMI tend to have better running speed. This study contributes to the understanding that BMI reflects good physical performance, and suggests a more functional and personalized evaluation of physical fitness. Further research is recommended to involve body composition and other fitness factors.