en آسیب شناسی ورزشی و حرکات اصلاحی Sport injury and corrective exercises پژوهشي Research <b>Purpose:</b> The purpose of this study was to investigate the relationship between hip and knee strength with knee valgus angle during drop jump in elite female athletes.&nbsp; <div><b>Methods:</b> Forty female athletes (mean &plusmn; SD age, 21.5 &plusmn; 1.99 years height, 169.08 &plusmn; 8.25 cm body mass, 61.05 &plusmn; 10.06 kg) participated in this study. Isometric hip and knee muscles strength were evaluated using standard clinical procedures and a handheld dynamometer. Knee valgus angle was assessed using a 6-camera motion analysis system during a drop jump task. Pearson correlation analyses were performed to determine the relationship between hip and knee muscles strength and knee valgus angle at initial contact (P&le;0.05).&nbsp; <div><b>Results:</b> Hip abductor strength and knee flexor-extensor ratio were found to be negatively correlated with knee valgus angle (r = &ndash;0.229, P = 0.04 and r = &ndash;0.446, P = 0.002, respectively).&nbsp;</div> <div><b>Conclusion:</b> No relationship between measure of hip external rotation strength and knee valgus angle was observed (P = 0.39). Strength training of the hip and knee musculature may still need to be addressed in prevention programs, but it also should be combined with teaching proper</div> </div> Strength, Knee Valgus Angle, Knee Injuries, Kinematics 39 46 http://ptj.uswr.ac.ir/browse.php?a_code=A-10-163-1&slc_lang=en&sid=1 Farzaneh Saki فرزانه ساکی f_saki@ut.ac.ir Yes Tehran University دانشگاه تهران Reza Rajabi رضا رجبی No Tehran University دانشگاه تهران Mohammad hosein Alizadeh محمدحسین علیزاده No Tehran University دانشگاه تهران Farhad Tabatabaei فرهاد طباطبایی No دانشگاه علوم بهزیستی و توانبخشی