Objective: This research aimed to study the effect of Integrative neuromuscular training on developing Functional Movement Screen scores, some special physical abilities, and the performance level of poomsae (Taegeuk Ee Jang) for taekwondo juniors under 12 years of age. Research procedures: The basic research sample was (20) juniors whom the training program was applied for a period of 8 weeks, consisting of 2 training units. All juniors completed the following tests before and after the training program: Functional Movement Screen tests, physical tests, and measuring the level of poomsae performance (Taegeuk Ee Jang). The data were processed statistically using the following statistical methods: Mean, standard deviation, median, skewness coefficient, Mann-Whitney test, correlation coefficient, Wilcoxon test, improvement percentage equation, Cohen's test. Results: Integrative neuromuscular training has a positive effect on the development of some special physical abilities (speed of changing direction, muscular power, coordination, Movement speed, dynamic balance, endurance of muscular strength of the core), Functional Movement Screen scores, and the level of poomsae performance (Taegeuk Ee Jang) for Taekwondo juniors under 12 years old. There were statistically significant differences between the first experimental and control groups in the post-measurement of the total score of the tests Functional Movement Screen, some special physical abilities, and the level of poomsae performance (Taegeuk Ee Jang) in favor of the experimental group. Recommendations: Researchers recommends the importance of using Integrative neuromuscular training in developing physical abilities and Functional Movement Screen for athletes in various sports activities and for different age stages during different season periods.