The aim of this study was to compare the performance and upper limb strength of semi-professional female volleyball players with and without shoulder injury history. For this purpose, 40 volleyball players in two injured groups (number: 20 people, age: 25.60 ± 2.89 years, height: 1.63 ± 0.07 m, weight: 59.55 ± 4.71 kg, index body mass: 22.46 ± 2.50 kg/m2) and without shoulder injury (number: 20 people, age: 24.50 ± 2.76 years, height: 1.61 ± 0.04 m, weight: 17 58.20 ± 5 kg, body mass index: 22.36 ± 2.60 kg/m2) were classified as subjects in this study and participated. A questionnaire was used to collect demographic information and information related to injury history and sports history. The strength of flexion, extension, abduction, adduction, internal rotation and external rotation was evaluated by manual strength meter (MMT). Also, athletes with a history of shoulder injury had performance disability and were evaluated with the DASH shoulder disability questionnaire. Independent t-test and Mann-Whitney's U test were used to compare the strength ratio of superior and non-superior limb muscles between groups (P<0.05); The results show a significant difference between functional disability (p=0.001), flexor to extensor muscle strength ratio (p=0.03), abductor to adductor (p=0.03) and internal rotator to external rotator (p=0.001). p=0) was in the superior hand. However, no significant difference was observed between the strength ratio of non-dominant hand muscles. According to the results of the research, it seems that long-term presence and performing repetitive movements cause changes in the imbalance of muscle power, which are related to the occurrence of damage and changes in the movement pattern in the affected joint.