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Oblique abdominal muscle activity in standing and in sitting on hard and soft seats

机译：站立和坐在硬软座椅上的腹腹斜肌活动

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textabstractThe activity of the oblique abdominal muscles was investigated with the trunk in unconstrained, symmetrical and static postures. Electromyographic recordings in six healthy subjects revealed that in all subjects the activity of both the internal and the external obliques is significantly higher in unconstrained standing than in supine posture. Activity of the internal oblique was higher than that of the external oblique abdominal. The sacrospinal, gluteus maximus and biceps femoris muscles showed practically no activity in unconstrained erect posture. During unconstrained sitting both oblique abdominals are active. In most subjects the activity of the oblique abdominals was significantly smaller when sitting on a soft car seat than when sitting on an office chair with a hard seat. The possibility is discussed that contraction of the oblique abdominals in unconstrained standing and sitting may help in stabilizing the basis of the spine and particularly the sacroiliac joints. During standing and sitting the oblique abdominal muscles apparently have a significant role in sustaining gravity loads.
机译：腹主动脉以不受约束的，对称的和静态的姿势研究了斜腹肌的活动。六个健康受试者的肌电图记录显示，在所有受试者中，不受约束的站立时内斜肌和外斜肌的活动均显着高于仰卧姿势。内斜肌的活动度高于腹外斜肌的活动度。 un，臀大肌和股二头肌在不受约束的直立姿势下几乎没有活动。在不受约束的坐姿中，两个斜腹肌都活动。在大多数受试者中，坐在柔软的汽车座椅上时，与坐在有硬座的办公椅上时相比，斜腹肌的活动明显较小。讨论了在不受限制的站立和坐姿下腹斜肌的收缩可能有助于稳定脊柱尤其是sa关节的基础的可能性。在站立和坐着的过程中，斜腹肌显然在维持重力负荷方面起着重要作用。

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