Hoseo-ro 79gil, Baebang-eup, Asan-si, Chungnam 336-795, South Korea.
Hoseo-ro 79gil, Baebang-eup, Asan-si, Chungnam 336-795, South Korea.
J Electromyogr Kinesiol. 2014 Apr;24(2):228-32. doi: 10.1016/j.jelekin.2013.10.003. Epub 2013 Oct 22.
The aim of this study was to investigate the effects of quiet inspiration versus slow expiration on sternocleidomastoid (SCM) and abdominal muscle activity during abdominal curl-up in healthy subjects. Twelve healthy subjects participated in this study. Surface electromyography (EMG) was used to collect activity of bilateral SCM, rectus abdominis (RA), external oblique (EO), and transversus abdominis/internal oblique (TrA/IO) muscles. A paired t-test was used to determine significant differences in the bilateral SCM, RF, EO, and TrA/IO muscles between abdominal curl-up with quiet inspiration and slow expiration. There were significantly lower EMG activity of both SCMs and greater EMG activity of both IOs during abdominal curl-up with slow expiration, compared with the EMG activity of both SCMs and IOs during abdominal curl-up with quiet inspiration (p<.05). The results of this study suggest that slow expiration would be recommended during abdominal curl-up for reduced SCM activation and selective activation of TrA/IO in healthy subjects compared with those in abdominal curl up with quiet inspiration.
本研究旨在探讨在健康受试者进行仰卧起坐时，安静吸气与缓慢呼气对胸锁乳突肌（SCM）和腹部肌肉活动的影响。12 名健康受试者参与了这项研究。使用表面肌电图（EMG）来收集双侧 SCM、腹直肌（RA）、腹外斜肌（EO）和腹横肌/内斜肌（TrA/IO）的活动。采用配对 t 检验来确定仰卧起坐时安静吸气和缓慢呼气时双侧 SCM、RF、EO 和 TrA/IO 肌肉之间的显著差异。与安静吸气时相比，缓慢呼气时双侧 SCM 和双侧 IO 的 EMG 活动明显降低，而腹直肌的 EMG 活动增加（p<.05）。与仰卧起坐时的安静吸气相比，本研究的结果表明，在仰卧起坐时缓慢呼气可以减少 SCM 的激活，并选择性地激活健康受试者的 TrA/IO。
