Background

Modifications of posture in a segment may influence the posture of adjacent and nonadjacent segments and muscular activity. The spine–shoulder and spine–pelvis relationships suggest that the pelvis may influence shoulder posture.

Objective

To investigate the effect of the active reduction of the anterior pelvic tilt on shoulder and trunk posture during static standing posture and on the electromyographic activity of the scapular upward rotators during elevation and lowering of the arm.

Methods

Thirty-one young adults were assessed in a relaxed standing position and a standing position with 30% active reduction of the anterior pelvic tilt. The pelvic tilt, trunk posture, and forward shoulder posture during the static standing posture and the electromyographic activity during elevation and lowering of the arm were assessed.

Results

Paired t-tests indicated that the active reduction of the anterior pelvic tilt reduced the trunk extension (MD = 1.09; 95%CI = −2.79 to −1.03). There were no effects on the forward shoulder posture (MD = 0.09; 95%CI = −0.92 to 1.09). Repeated measures of analyses of variance indicated an increase in lower trapezius electromyographic activity (MD = 3.6; 95%CI = 1.28 to 5.92). There was a greater reduction in upper trapezius activity after pelvic tilt reduction during arm elevation (MD = 1.52%; 95%CI = −2.79 to −0.25) compared to that during the lowering phase. There were no effects of pelvic tilt reduction on the electromyographic activity of the serratus anterior (MD = 3.26; 95%CI = −3.36 to 9.87).

Conclusion

The influence of pelvic posture on the trunk posture and lower trapezius activation should be considered when assessing or planning exercise for individuals with shoulder or trunk conditions.

中文翻译：

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减少骨盆前倾对肩部姿势和肩cap骨向上旋转肌的肌电活动的影响。

背景

段中姿势的改变可能会影响相邻和不相邻段的姿势以及肌肉活动。脊柱-肩部和脊柱-骨盆之间的关系表明骨盆可能会影响肩部姿势。

目的

为了研究在静态站立姿势期间主动减少前骨盆倾斜对肩和躯干姿势的影响，以及在手臂抬高和放下过程中对肩upward骨向上旋转肌的肌电活动的影响。

方法

评估了31位年轻成年人的放松站立姿势和主动减少30％骨盆前倾的站立姿势。评估静态站立姿势期间的骨盆倾斜，躯干姿势和前肩姿势，以及手臂抬高和放下过程中的肌电图活动。

结果

配对的t检验表明，主动减少骨盆前倾会减少躯干伸展（MD = 1.09； 95％CI = -2.79至-1.03）。对前肩姿势没有影响（MD = 0.09； 95％CI = -0.92至1.09）。重复分析方差表明，斜方肌肌电活动降低（MD = 3.6； 95％CI = 1.28至5.92）。与降低阶段相比，手臂抬高期间骨盆倾斜减少后上斜方肌活动的减少更大（MD = 1.52％； 95％CI = -2.79至-0.25）。骨盆倾斜减小对前锯肌的肌电图活动没有影响（MD = 3.26； 95％CI = -3.36至9.87）。

结论

在评估或计划患有肩部或躯干状况的人的运动时，应考虑骨盆姿势对躯干姿势和下斜方肌活动的影响。