The aim of the present study is to investigate the effect of core training applied regularly for 8 weeks on selected physical parameters in 10-12-year-old badminton players. Twenty-four active badminton players with an average age of 11.6 voluntarily participated in the study. Participants were randomly divided into two groups. These groups were formed as the Core Training Group (CTG) (n:12) and the Control Group (CG) (n:12). The experimental group participated in core training in addition to badminton training for 8 weeks, 3 days a week. The control group continued their routine badminton training. The core training plan included a total of 7 exercises: Sit-ups, Mountain Climbers, Flutter Kicks, Plank, Crunches-Up Hold Arm Pump, and Seated Knee Up. SPSS 23.0 software was used to analyze the data in the study. The Wilcoxon Test was used to evaluate the difference between the two groups before and after training. A significance level of p < 0.05 was accepted for the interpretation of the results. The findings of the study showed that the 8-week core training program resulted in statistically significant differences between the pre-test and post-test values for vertical jump and 20 m sprint in the experimental group. In conclusion, core training is a highly effective method for developing physical parameters, particularly in young athletes; however, it is not sufficient on its own to develop all performance components. Therefore, it is recommended that coaches and athletes supplement core exercises with agility, balance, strength, and sport-specific exercises.