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Background and Aim: More recently, attention has turned to the role of proximal structures in function of lower limb. Decreased lumbo-pelvic (or core) stability has been suggested to contribute to the etiology of lower extremity sport injuries. This is largely due to the closed chain nature of athletic activities. Groin pain is a common complaint for athletes participating in sports such as soccer. Adductor-related groin pain was the most common primary entity in soccer players. Therefore, the aim of this study was to compare of core stability between male soccer players with and without hip adductors strain. Various studies have been done for treatment and prevention of recurrent of this lesion and the most important thing in these studies was to keep the integrity of  the core stability.
Materials and Methods: Fifty professional soccer players (25 healthy and 25 with adductors strain. mean age: 21.32±2.73) was studied. Core stability was compared among them by 5 endurance and functional tests. Endurance of back extensors, trunk flexors and lateral flexors were tested by Modified Biering-Sorensen and Mc.Gilltests.In current research, the Double Leg Lowering test is applied to measure the function of the oblique abdominals muscles and the Single Leg Squat test is applied to measure the function of hip abductor and external rotators muscles.
Results: Endurance of back extensors, flexors and lateral flexors were significantly lower in the injured soccer players in comparison with the healthy players. Significant decrease in the function of oblique abdominal muscles, hip abductor and external rotator muscles were founded in the injured players (p<0.05).
Conclusion: Decrease of endurance and function in the trunk muscles is probably an important risk factor for hip adductors strain injuries in the soccer players. Increasing the endurance of the core muscles can be reduced the occurrence of hip addactors strain.