A Kinesiological Analysis of the Stand-to-Sit during the Third Trimester
A Kinesiological Analysis of the Stand-to-Sit during the Third Trimester
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DOI：
10.1589/jpts.24.621
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发表时间：
2012-08-01
影响因子：
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通讯作者：
Takeda, Kaname
中科院分区：
文献类型：
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作者：
Takeda, Kaname
【目的】本研究的目的是对妊娠晚期的站坐运动进行运动学分析。【研究对象】8名妊娠晚期孕妇和8名非孕妇参与了本研究。[方法]受试者从站立位置开始，坐在400 mm高的座位上。采用三维运动分析系统和测力板采集数据。分析的测量值为：(1)坐下的时间；(2)小腿关节力矩；(3)楼板前后反作用力和垂直反作用力；(4)下肢和躯干的活动范围。采用Mann-Whitney U检验对孕妇和非孕妇进行统计分析。【结果】孕妇坐下所需时间、膝关节伸展力矩、运动后向和垂直分量均显著增高。其他关节的活动范围在孕妇和非孕妇之间没有显著差异。【结论】孕妇坐位时由于后底板反作用力增大，导致后平衡不稳定。在妊娠晚期，由于体重增加和重心转移的影响，坐下的动作需要注意。
[Purpose] The purpose of this study was to kinesiologically analyze of the stand-to-sit motion in the third trimester. [Subjects] Eight pregnant women in their third trimester and 8 non-pregnant women participated in this study. [Methods] Subjects were asked to sit-down on a 400-mm-high seat from the standing position. A 3D motion analysis system and a force plate were used to collect data. Measurements analyzed were (1) the time taken to sit down; (2) the leg joint moment; (3) the antero-posterior and vertical floor reaction forces; and (4) the range of motion of the lower limbs and trunk. Statistical analyses were conducted to compare the pregnant with non-pregnant women using the Mann-Whitney U test. [Results] For pregnant women, the time taken to sit down, the knee extension moment, as well as the posterior and vertical components of the motion were significantly higher. The ranges of motion of the other joints were not significantly different between the pregnant and non-pregnant women. [Conclusion] Pregnant woman have unstable posterior balance when sitting down due to the increase of the posterior floor reaction force. In the third trimester, the sit-down motion requires attention because of the impact of weight gain and the shift in the center of gravity.