Comparison of muscle activity according to various squat exercise with hip external rotation Kim Hun-Hyun1, Park Su-Min1, Lee Seung-Hak1, Lee Dong Yeop1, Yu Jae Ho1, Kim Jin Seop1, Hong Ji Heon1,* 1Dept. Physical Therapy, Sun Moon Univeresity, Asan-si, Chungnam, Republic of Korea, 31460 *Corresponding Author: Ji Heon Hong Professor, Department of Physical Therapy, Sunmoon University, Korea Email: hgh1020@hanmail.net
Online published on 16 October, 2018. Abstract Background/Objectives The purpose of this study was to suggest that effective position of squat exercise according to squat type and the degree of hip external rotation.. Method/Statistical Analysis All the squat was performed parallel squat position which knee 90° flexion. We compared three squat type which standard squat, 150% width stance of shoulder squat, wall squat. Hip joint external rotation degree was set 0°, 30°, 50°. Muscle activities were measured using EMG.. Findings There were significant differences about adductor longus, vastus lateralis, semitendinosus according to squat type (p<.05). The adductor longus appeared when SS and WS, 150S and WS were compared to each other (p<.05). Semitendinosus SS and 150S, SS and WS were significantly different (p<.05). By contrast, no significant differences in hip joint external rotation degree (p>.05). Improvements/Applications Clinically, we could suggest effective squat type and position to increase muscle strength selectively by using wall squat and 150 width stance of shoulder squat. Top Keywords Squat exercise, Hip external rotation, Muscle activity, Knee extensor, Wide based squat, Wall squat. Top |