НЭГ ХӨЛ ДЭЭР СУУХ БОЛОН ШАТААР УРУУДАХ СОРИЛЫН ҮЕИЙН ТҮНХНИЙ БУЛЧИНГИЙН ХҮЧ БОЛОН ӨВДӨГНИЙ ҮЕНИЙ КИНЕМАТИКИЙН ХОЛБОО ХАМААРАЛ

MUNKH-ERDENE BAYARTAI , MD1,2), MASAAKI SAKAMOTO, RPT, PhD2), RIE NAKAZAWA, RPT, PhD2), MASASHI AOYAGI, RPT, MS3), TATSUYA KASUYAMA, RPT, MS3) 

 Relationship Between Hip Muscle Strength and Kinematics of the Knee Joint during Single LegSquatting and Dropping

Key words: Patellofemoral pain syndrome, Knee medial displacement, Kinematics [Purpose] The aim of this study was to determine relationship between hip muscle strength and kinematics of the knee joint during single leg squatting and dropping. [Subjects] Twelve healthy subjects participated in this study. [Methods] The knee medial displacement was measured during single leg squatting and dropping using a highspeed camera. Peak isometric muscle strengths of the following muscles were measured hip abductors, hip adductors, hip external rotators, hip internal rotators, knee extensors and knee flexors. [Results] Muscle strength of hip external rotators was associated with knee medial displacement during both single leg squatting (r=–0.69) and dropping (r=– 0.59), and muscle strength of knee flexors was associated with knee medial displacement during dropping (r=–0.58). [Conclusion] The present results suggest that hip muscles’ strength, particularly hip external rotators’ strength are closely associated with knee medial displacement. Key words: Patellofemoral pain syndrome, Knee medial