Relationship between Hip Abductors, External Rotators Strength and Dynamic Knee Valgus in Jumper's Knee

Abstract Background: Jumper's knee may be a common and note-worthy issue experienced in sports medicine and sports injuries. The relationship between proximal hip muscle strength and dynamic knee valgus would modify the load on the patellar tendon which can cause jumper's knee. Aim of Study: To investigate the relationship between the isometric strength of the hip abductors, external rotators and dynamic knee valgus angle in subjects with or without jumper's knee, and to check out if there's an association between those factors with pain level and level of disability. Material and Methods: Forty-five male subjects extended (from 18 to 35) years-old recreationally active people were enrolled to take part in this study. All athletes were evaluated by HHD to measure peak force of isometric strength of hip abductors and external rotators. And frontal plane projection point (FPPA) was evaluated by Kinovea Computer Program (KCP) video analysis. The level of pain and knee dysfunction level were assessed by victorian institute sports assessment-patellar tendon questionnaire and visual analogue scale. Results: There no significant correlations were found between peak abductors and external rotators isometric strength with VISA-P and VAS. No significant correlations were observed between dynamic knee valgus with VAS and VISA P score. No significant correlations were observed between dynamic knee valgus and isometric strength of hip abductors and external rotators. Conclusion: It was conducted that no significant relation-ships were observed between hip abductors, external rotators and dynamic knee valgus with level of pain and knee disability in jumper's knee athletes.