Objective: This research aimed to study Effect of Accentuated Eccentric Training on developing some specific physical abilities and effectiveness of attack kicks for kyorugi players in taekwondo. Research procedures: The basic research sample is (10) players on whom training program was applied for a period of 10 weeks with 2 training units. All players completed the following tests before and after training program: physical tests and measuring the effectiveness of attack kicks. Data were processed statistically using the following statistical methods: Mean, Standard deviation, Median, Skewness, Mann-Whitney test, Correlation coefficient, Wilcoxon test, Equation of percentage change. Results: Accentuated Eccentric Training led to the development specific physical abilities (Maximum muscular strength of the legs, Horizontal and Vertical muscular power of the legs, Specific agility, Specific Power, and Movement speed of the legs), where the rates of improvement reached between (9.12%: 26.50%), and effectiveness of attack kicks, where the rates of improvement (16.9%) for Taekwondo players. There were statistically significant differences between the experimental and control groups in the post-measurement of specific physical abilities (under research) and the effectiveness of attack kicks in favor of the experimental group. Recommendations: Researcher recommends the importance of using Accentuated Eccentric training to develop the specific physical abilities and effectiveness of attack kicks for various self-defense sports and for different age stages.