앉은 높이에 따른 배 근육 수축 능력에 대한 연구

The purpose of this study was to find the optimal seat height for each core muscles by comparing the depth change measured on the sonographic images. Healthy 9 males and 10 females were randomly seated on one of four chairs with different heights (at knee level, at knee lever with foot rest, 5cm above the knee level, and 10cm above the knee level) and were asked to draw in their belly button toward the stomach. Snap shots of sonography of the multifidus, transvers abdominis, internal obliques, and external obliques were taken during the relaxation with inhalation and the contraction with exhalation. The greatest difference was at the 5cm level above the knee in the multifidus, and at the knee level in the other 3 abdominal muscles in males. In females, the width difference was greater at the knee level and at the 5cm level above the knee in multifidus, at the 10cm level above the knee in transverse abdominis, at the 5cm and 10cm level above the knee in external obliques, and at the 10cm level above the knee in internal obliques. Finding of this study recommends that the physical therapists need to consider the different contraction ability of core muscles at different levels of chair when training the core stability for each gender.