Section of Biomechanics, Faculty of Physical Education and Sport, University of Physical Education, Krakow, Poland.
Section of Rehabilitation in Orthopaedics, Department of Clinical Rehabilitation and Laboratory of Pathology of the Musculoskeletal System, Faculty of Motor Rehabilitation, University of Physical Education, Krakow, Poland.
PLoS One. 2019 Jan 16;14(1):e0209766. doi: 10.1371/journal.pone.0209766. eCollection 2019.
From among many studies observing the walking pattern throughout pregnancy, only two items monitor the influence of pregnancy on the movement system during gait considering the period before gestation.
Does the women's gait pattern at the end of the first trimester undergo changes in comparison to body movement pattern before pregnancy?
All subjects who met the inclusion criteria gave signed and informed consent before the study. Two experimental sessions were arranged according to the same protocol: (P0) before pregnancy and (P1) at the end of the first trimester of pregnancy (12th week of gestation). At first the anthropometric measures were taken. Then, walking trials at a self-selected speed along a walkway were registered with Vicon 250 (Oxford Metrics Ltd.; Oxford, UK) and FreeMED force platform (Sensor Medica, Italy).
An analysis of anthropometric parameters in 12th pregnancy week demonstrated significant changes in mean values of waist circumference and waist to hip ratio as well as waist to height ratio indexes compared to the results before pregnancy. No significant differences were found in the basic kinematic gait parameters between experimental conditions. Significant increase of mean inter-ankle distance during double support phase occurred during the first trimester of pregnancy. Also, the ratio of the ankle separation width to the pelvic width was noticeably higher in gestation. Then, angular changes of the pelvis in coronal and transverse planes throughout gait cycle during pregnancy demonstrated significant differences compared to those measured before pregnancy. At the same time in the first trimester of pregnancy no adaptive changes in the pattern of feet loading take place.
Since our study is of longitudinal character, in the course of pregnancy we expect compensatory mechanisms more clearly demonstrated. Therefore, we hope to identify a strategy of the gravid body progression in space.
在观察整个孕期行走模式的众多研究中，只有两项研究在考虑妊娠前阶段的情况下，监测了妊娠对步态运动系统的影响。
与妊娠前的身体运动模式相比，初产妇在妊娠末期的步态模式是否会发生变化？
所有符合纳入标准的受试者在研究前均签署并同意知情同意书。根据相同的方案安排了两个实验阶段：（P0）在妊娠前，（P1）在妊娠的第一 trimester（妊娠第 12 周）结束时。首先进行人体测量学测量。然后，使用 Vicon 250（Oxford Metrics Ltd.；牛津，英国）和 FreeMED 力平台（Sensor Medica，意大利）沿步道以自选择速度进行行走试验。
第 12 周妊娠时的人体测量参数分析表明，与妊娠前相比，腰围、腰臀比和腰高比的平均值均发生显著变化。在实验条件下，基本运动学步态参数无显著差异。在妊娠的第一个 trimester 期间，双支撑阶段的平均踝关节间距离明显增加。此外，在妊娠期间，踝关节分离宽度与骨盆宽度的比值明显更高。然后，整个步态周期中骨盆在冠状面和横断面上的角度变化与妊娠前相比存在显著差异。与此同时，在妊娠的第一个 trimester 期间，脚的加载模式没有发生适应性变化。
由于我们的研究具有纵向特征，因此我们预计在妊娠过程中会更清楚地显示出代偿机制。因此，我们希望确定一种在空间中孕妇身体进展的策略。
