Fujitani Ryo, Jiroumaru Takumi, Noguchi Shinichi, Michio Wachi, Ohnishi Hitoshi, Suzuki Mika, Ozawa Takuya
Department of Physical Therapy, Biwako Professional University of Rehabilitation: 967 Kitasaka-cho, Higashiomi City, Shiga 527-0145, Japan.
Department of Applied Biology, Kyoto Institute of Technology, Japan.
J Phys Ther Sci. 2021 Mar;33(3):295-298. doi: 10.1589/jpts.33.295. Epub 2021 Mar 17.
[Purpose] The purpose of the current study was to reveal the association between posture control and muscle activity by measuring the trunk and hip joint muscle activities in the upright and slump sitting positions in both the healthy participants and patients with recurrent lower back pain. [Participants and Methods] We recruited eleven patients of recurrent lower back pain and ten healthy participants. During the maintenance of the two types of posture, upright and slump, we collected the surface electromyography data. We assessed the following muscles: rectus abdominis, external oblique, thoracic erector spinae, lumbar erector spinae, internal oblique, lumbar multifidus, iliacus, serratus anterior, rectus femoris, tensor fascia latae, and gluteus maximus. We studied the differences in spinal-pelvic curvature and muscle activity between the upright and slump positions in each group. [Results] In the healthy group, comparison of the muscle activity in upright and slump positions for both the trunk (external oblique, internal oblique, lumbar erector spinae, and lumbar multifidus), and the hip muscles (iliacus and gluteus maximus) showed a significant decrease in activity in the slump position. In the group with recurrent lower back pain, although the external oblique, lumbar erector spinae and lumbar multifidus showed reduced activity in slump position, these values were smaller when compared to those in the healthy group. [Conclusion] This study aimed to clarify the relationship between posture (upright and slump) and the activity of the trunk and hip joint muscles in the healthy participants and the patients with recurrent lower back pain. The results indicated that postural changes caused by recurrent lower back pain significantly affected the activity of the muscles involved in controlling the posture.
[目的]本研究旨在通过测量健康参与者和复发性下背痛患者在直立位和 slumped 坐姿下的躯干和髋关节肌肉活动，揭示姿势控制与肌肉活动之间的关联。[参与者与方法]我们招募了 11 名复发性下背痛患者和 10 名健康参与者。在维持直立和 slumped 这两种姿势的过程中，我们收集了表面肌电图数据。我们评估了以下肌肉：腹直肌、腹外斜肌、胸段竖脊肌、腰段竖脊肌、腹内斜肌、腰多裂肌、髂肌、前锯肌、股直肌、阔筋膜张肌和臀大肌。我们研究了每组中直立位和 slumped 位之间脊柱-骨盆曲率和肌肉活动的差异。[结果]在健康组中，比较躯干（腹外斜肌、腹内斜肌、腰段竖脊肌和腰多裂肌）和髋部肌肉（髂肌和臀大肌）在直立位和 slumped 位的肌肉活动，发现 slumped 位的活动显著降低。在复发性下背痛组中，虽然腹外斜肌、腰段竖脊肌和腰多裂肌在 slumped 位的活动有所降低，但与健康组相比，这些值较小。[结论]本研究旨在阐明健康参与者和复发性下背痛患者的姿势（直立和 slumped）与躯干和髋关节肌肉活动之间的关系。结果表明，复发性下背痛引起的姿势变化显著影响了参与姿势控制的肌肉的活动。
