Trunk motion and gait characteristics of pregnant women when walking: report of a longitudinal study with a control group
Trunk motion and gait characteristics of pregnant women when walking: report of a longitudinal study with a control group
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DOI：
10.1186/1471-2393-13-71
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发表时间：
2013-03-20
影响因子：
3.1
通讯作者：
Gilleard, Wendy L.
中科院分区：
文献类型：
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作者：
Gilleard, Wendy L.
背景：对怀孕和产后进行纵向重复测量设计，并设置对照组，可以深入了解女性在常见的寿命期间负荷变化的情况下身体的机械适应，同时最大限度地减少人际差异的影响。目的是调查怀孕期间和产后骨盆和胸椎节段的运动范围、这些节段之间的运动（胸腰椎）以及步行时的步宽、步幅和速度的时空特征的系统变化。方法：使用 8 摄像头运动分析系统对 9 名孕妇在怀孕期间和产后 4 次以自行选择的速度沿着走道行走进行调查。对照组由 12 名未怀孕的未产妇组成，在同一时间段内进行了 3 次测试。研究了变化的线性趋势的存在。结果：随着妊娠的进展，步宽增加呈现显着线性趋势（p = 0.05），步长减小呈现显着线性趋势（p = 0.05）。同时，骨盆段 (p = 0.03) 和胸腰椎 (p = 0.01) 绕垂直轴（左右旋转）的运动范围以及骨盆段 (p = 0.04) 绕前后轴（侧倾斜）的运动范围呈显着线性下降趋势。出生后，步宽重新适应，而骨盆（p = 0.02）和胸椎（p < 0.001）节段屈伸运动范围分别减少和增加。所有变化的幅度均大于重新测试中自然变异所解释的变化。结论：随着怀孕的进展和产后，当以自我确定的自然速度行走时，生物力学变化出现显着的线性趋势，该变化大于重复测试中自然变异所解释的变化。并非所有的适应都会在出生后八周内得到解决。
Background: A longitudinal repeated measures design over pregnancy and post-birth, with a control group would provide insight into the mechanical adaptations of the body under conditions of changing load during a common female human lifespan condition, while minimizing the influences of inter human differences. The objective was to investigate systematic changes in the range of motion for the pelvic and thoracic segments of the spine, the motion between these segments (thoracolumbar spine) and temporospatial characteristics of step width, stride length and velocity during walking as pregnancy progresses and post-birth.Methods: Nine pregnant women were investigated when walking along a walkway at a self-selected velocity using an 8 camera motion analysis system on four occasions throughout pregnancy and once post birth. A control group of twelve non-pregnant nulliparous women were tested on three occasions over the same time period. The existence of linear trends for change was investigated.Results: As pregnancy progresses there was a significant linear trend for increase in step width (p = 0.05) and a significant linear trend for decrease in stride length (p = 0.05). Concurrently there was a significant linear trend for decrease in the range of motion of the pelvic segment (p = 0.03) and thoracolumbar spine (p = 0.01) about a vertical axis (side to side rotation), and the pelvic segment (p = 0.04) range of motion around an anterio-posterior axis (side tilt). Post-birth, step width readapted whereas pelvic (p = 0.02) and thoracic (p < 0.001) segment flexion-extension range of motion decreased and increased respectively. The magnitude of all changes was greater than that accounted for with natural variability with re testing.Conclusions: As pregnancy progressed and post-birth there were significant linear trends seen in biomechanical changes when walking at a self-determined natural speed that were greater than that accounted for by natural variability with repeated testing. Not all adaptations were resolved by eight weeks post birth.