The kinematic analysis of degree of the lumbar spine curvature of pregnant women in different stages of pregnancy

The purpose of this study is to identify the degree of the lumbar spine curvature of pregnant women in the different trimesters of pregnancy. In addition, we can identify the levels of low back pain in various stages of pregnancy and manifestations of imbalance on some kinematic variables in the walking cycle. In order to achieve the goals of this study, the descriptive approach has been applied to 24 healthy patients. The researchers used two rulers to measure the degree of the lumbar spine curvature, and a questionnaire to quantify the level of low back pain and imbalance disruption. Also, the researchers used two cameras to filmed patients while walking on the treadmill: one camera was put laterally (60 f/sec) and the other was put on the front (50 f/sec). Furthermore, the results of the study showed that the degree of the lumbar backbone curvature, the low back pain and imbalance increase in the transition to the next trimester of pregnancy. The results also showed decrease of length and speed of the walking step, increasing the time of dual and individual reinforcement.