The purpose of this study is to examine the relationship between core stability and some performance parameters in 14-16 age group male long distance runners and football players. 15 male long distance runners and 15 male football players with an average whose height measured ranged from 172.400 ± 7.3513 cm participated in the study. Core stability was determined by plank test and performance values were measured by using tests such as; 30 m speed running, pro-agility, long jump and 60 s shuttle pull. Descriptive and paired-sample t tests were used to compare core stability and performance values. When it is analysed according to football and athletics branches, it is seen that there is no significant difference between the branches in terms of height, body weight, BMI (Body Mass Index), plank and shuttle numbers they can pull in 60 seconds (p < 0.05). However, it was found that 30 m speed running time, standing long jump distance and pro-agility test values showed a significant difference in favour of athletics (p < 0.01).