© 2017 Fizyoterapi Rehabilitasyon. All rights reserved.Purpose: This study was conducted to compare the effects of core stabilization exercises on hip flexion and extension muscle strength in female and male judo athletes. Methods: The study was carried out with 20 (11 mates and nine females) judo athletes aged between 13-19 (16.53±1.62) years. Athletes were asked to perform an eight-week (one set of 10 repetitions twice a day) core endurance exercise program. Isokinetic hip flexion and extension muscle strength measurement were performed. Core muscle endurance was measured using static trunk extensor endurance test, static trunk flexor endurance test and static side bridge endurance tests before and after training. Results: It was found that males were stronger than females regarding hip flexion and extensor muscle strength (p>0.05) and their core endurance were better except the extensor endurance (p<0.01). In addition, pre-existent muscular strength imbalance against hip flexors in both female and male athletes was fixed with the core stabilization exercise training program. Conclusion: Core endurance in judo athletes was effective to increase flexor and extensor muscle strength. Therefore, it was concluded that core endurance was an important parameter to fix agonist-Antagonist muscle strength imbalance and should be taken into account when planning training programs. In addition, female judo athletes have weaker muscle strength and core stabilization than male athletes which highlights the importance of core stabilization training, especially in female athletes.