Effects of a dynamic squat with hip adduction on lower-limbs muscle activation for healthy and patellofemoral pain syndrome subjects

• Main Authors: YANG,CHIEH-YI, 楊潔宜
• Other Authors: CHIU,MIN-CHI
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/dr9cv6

碩士 === 國立勤益科技大學 === 工業工程與管理系 === 107 === An imbalance in the activation of the vastus medialis oblique (VMO) and vastus lateralis (VL) muscles may be one of the major causes of patellofemoral pain syndrome (PFPS). Clinicians commonly attempt to facilitate VMO activity by instructing patients to squeeze a ball between their knees during squatting exercises. The purpose of this study was to determine whether VMO, VL and hip adductor (ADD) muscles activation amplitude and the VMO/VL ratio were altered when performing active hip adduction during a dynamic squat exercise. The purpose of this study was to determine whether the activation amplitude and VMO / VL ratio of the vastus lateralis (VL), vastus medialis oblique (VMO) and hip adduction (ADD) occurred during active hip adduction during dynamic sacral exercise. change. In this trial, 16 subjects (14 females and 2 males) were enrolled, and the subjects were divided into healthy group and patient group 2, and recorded separately by wireless electromyography system, wireless motion analysis system and Noraxon MyoResearch 3 software. In the lower jaw, there is no hip joint adduction movement (lower jaw), lower jaw hip joint adduction movement (lower jaw ball), up and down stairs three test items on myoelectric signal (EMG), myoelectric ratio (VMO / VL ratio) And the onset time rating. The results showed that in the healthy group and the patient group, vastus lateralis (VL), vastus medialis oblique (VMO), vastus lateralis (VL) potential initiation time, vastus medialis oblique (VMO) potential initiation time and hip adduction (ADD) potential start-up time of the potential (p<.05); no hip joint adduction in the lower jaw and adduction of the lower extremity hip adduction (ADD), vastus lateralis (VL) potential initiation time and hip adduction ( ADD) Potential start-up time of the potential (p<.05). Conclusions in the patients with squatting and unrelated adduction, the patient group needs to use the larger vastus lateralis (VL) and vastus medialis oblique (VMO) muscle strength; there is no difference in the muscle potential when the squat has an unrelated adduction action. In the PFPS group, the three muscles of the vastus lateralis (VL), vastus medialis oblique (VMO), and hip adduction (ADD) in the patient group were 50% to 100% slower than the healthy group. In the lower extremity vastus lateralis (VL) and vastus medialis oblique (VMO) muscle onset time is 25% to 45% slower than the healthy group, providing future research and treatment of PFPS. Keywords: patellofemoral pain syndrome, dynamics squat exercise, vastus medialis obliquus, hip adduction, electromyography