Journal of Nursing Science and Engineering
Online ISSN : 2432-6283
Print ISSN : 2188-4323
ISSN-L : 2188-4323
Original Article
Changes in sock-wearing behavior and compensatory movements before and after wearing a materinty-simulation jacket
−Study using video images and pose estimation algorithms−
Mayuko NodaIzumi SaitoShintaro Izumi
Author information

2022 Volume 10 Pages 12-21


 As pregnancy progresses, the abdomen increases and pregnant womenss daily activities are expected to change. This study aimed to reproduce the changes in the body shape of pregnant females in third trimester using a maternity-simulation jacket, clarify the changes in movement patterns before and after wearing the jacket, and obtain useful suggestions for health guidance in pregnancy. Seventeen females were asked to put on socks in the sitting position before and after wearing the jacket; the characteristic changes in their movement were observed and evaluated from the recorded video images. Joint positions were estimated using a pose estimation algorithm, and three-dimensional coordinate information was extracted. Joint angles were calculated, and trends in movement patterns were analyzed using principal component analysis. In the end-occupant position, 8 (47.0%) wore socks with their thighs parallel to the mid-plane before wearing the device, and 9 (52.9%) wore socks with their hip joints in abduction and external rotation after wearing the device. The results suggest the necessity of using hip stretching and a sock-wearing self-help device.

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