Background: At the Background: Patellar tendinopathy presents one of the most common and formidable challenges for competitive athletes and sports medicine clinicians. Diagnosed clinically as activity-related anterior knee pain associated with focal patellar tendon tenderness it is frequently the source of chronic pain and limits athletic practice and performance. . The prevalence of jumper's knee (patellar tendinopathy) is high, up to 40%‐50%, in sports characterized by high demands on leg extensor speed and power, such as volleyball, basketball, football, and athletics. Balance relies on the integrated feedback and movement strategies among the hip, knee, and ankle, balance can be disrupted by diminished afferent feedback or deficiencies in the strength and mechanical stability of any joint or structure along the lower extremity kinetic chain. Poor balance has been associated with increased injury risk among athletes. Aim of the study: The purpose of the study was assess the dynamic balance in athletes with jumpers knee Subjects and Methods Fifteen basketball subjects with jumper’s knee were included in this study with age ranged from 15-30 years and body mass index ranged from 18.5-30 kg/cm2 participated in this study. The assessment was conducted for each subject individually on the Balance System (Biodex Medical Systems Inc, Shirley, NY, USA), to compare stability parameters between affected and non-affected lower limbs. The stability parameters examined in this current study were overall stability index, anteroposterior stability index and mediolateral stability index. Results: Statistical analysis using T-test was made to compare between the mean values of stability indexes There was no significant difference between the mean value of overall stability index (t =- 0.09, p =0.46) ,anteroposterior stability index (t = 0.07, p =0.47)and mediolateral stability index (t = - 0.17, p =0.43) in affected limb compared with non-affected at stability level 4 Conclusion: There was no significant difference observed the mean value of stability indexes in the comparison of affected side and unaffected side in lower limb in athletes with jumpers knee.
