Sit-to-stand at different periods of pregnancy

Shu Zon Lou, You Li Chou, Pei Hsi Chou, Chii-Jeng Lin, Uyi Chi Chen, Fong-chin Su

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Objective. This study was performed to determine the biomechanics of chair rising by pregnant women. Design. Relative body joint position and ground reaction forces were measured by a motion analysis system and one force plate. Background. Physiological and psychological changes during pregnancy impose postural demands and limit the performance of daily living activities such as rising from sitting to standing position. Methods. Twenty-four pregnant women, divided into three groups, were studied performing sit-to-stand transition from an armless and adjustable chair. By kinematic and kinetic analysis, the angles and moments of hip, knee and ankle joints were investigated. Results. The chair height has great influence on knee joint and hip joint moments, but less on ankle joints. In the third trimester for all chair heights, because of a marked increase in abdominal depth, the maximum hip moment is significantly less than that in first trimester, while the maximum knee moment is significantly larger. Pregnant women in third trimester produced larger knee moment during sit-to-stand transition from lower chair height. Conclusion. The mechanism of sit-to-stand is affected by the physical changes of pregnant women at different periods of pregnancy, e.g. increased loading of knee joint and decreased hip joint moment, especially in the last trimester period of pregnancy. Relevance - It is suggested that pregnant women in third trimester use a higher chair to decrease joint loading during chair-rise.

Original languageEnglish
Pages (from-to)194-198
Number of pages5
JournalClinical Biomechanics
Volume16
Issue number3
DOIs
Publication statusPublished - 2001 Mar 10

Fingerprint

Third Pregnancy Trimester
Pregnant Women
Hip Joint
Pregnancy
Knee Joint
Ankle Joint
Biomechanical Phenomena
Knee
Joints
Infant Equipment
First Pregnancy Trimester
Activities of Daily Living
Posture
Hip
Psychology

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine

Cite this

Lou, Shu Zon ; Chou, You Li ; Chou, Pei Hsi ; Lin, Chii-Jeng ; Chen, Uyi Chi ; Su, Fong-chin. / Sit-to-stand at different periods of pregnancy. In: Clinical Biomechanics. 2001 ; Vol. 16, No. 3. pp. 194-198.
@article{115427c411974255b22992d4e560d8e0,
title = "Sit-to-stand at different periods of pregnancy",
abstract = "Objective. This study was performed to determine the biomechanics of chair rising by pregnant women. Design. Relative body joint position and ground reaction forces were measured by a motion analysis system and one force plate. Background. Physiological and psychological changes during pregnancy impose postural demands and limit the performance of daily living activities such as rising from sitting to standing position. Methods. Twenty-four pregnant women, divided into three groups, were studied performing sit-to-stand transition from an armless and adjustable chair. By kinematic and kinetic analysis, the angles and moments of hip, knee and ankle joints were investigated. Results. The chair height has great influence on knee joint and hip joint moments, but less on ankle joints. In the third trimester for all chair heights, because of a marked increase in abdominal depth, the maximum hip moment is significantly less than that in first trimester, while the maximum knee moment is significantly larger. Pregnant women in third trimester produced larger knee moment during sit-to-stand transition from lower chair height. Conclusion. The mechanism of sit-to-stand is affected by the physical changes of pregnant women at different periods of pregnancy, e.g. increased loading of knee joint and decreased hip joint moment, especially in the last trimester period of pregnancy. Relevance - It is suggested that pregnant women in third trimester use a higher chair to decrease joint loading during chair-rise.",
author = "Lou, {Shu Zon} and Chou, {You Li} and Chou, {Pei Hsi} and Chii-Jeng Lin and Chen, {Uyi Chi} and Fong-chin Su",
year = "2001",
month = "3",
day = "10",
doi = "10.1016/S0268-0033(00)00114-5",
language = "English",
volume = "16",
pages = "194--198",
journal = "Clinical Biomechanics",
issn = "0268-0033",
publisher = "Elsevier Limited",
number = "3",

}

Sit-to-stand at different periods of pregnancy. / Lou, Shu Zon; Chou, You Li; Chou, Pei Hsi; Lin, Chii-Jeng; Chen, Uyi Chi; Su, Fong-chin.

In: Clinical Biomechanics, Vol. 16, No. 3, 10.03.2001, p. 194-198.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Sit-to-stand at different periods of pregnancy

AU - Lou, Shu Zon

AU - Chou, You Li

AU - Chou, Pei Hsi

AU - Lin, Chii-Jeng

AU - Chen, Uyi Chi

AU - Su, Fong-chin

PY - 2001/3/10

Y1 - 2001/3/10

N2 - Objective. This study was performed to determine the biomechanics of chair rising by pregnant women. Design. Relative body joint position and ground reaction forces were measured by a motion analysis system and one force plate. Background. Physiological and psychological changes during pregnancy impose postural demands and limit the performance of daily living activities such as rising from sitting to standing position. Methods. Twenty-four pregnant women, divided into three groups, were studied performing sit-to-stand transition from an armless and adjustable chair. By kinematic and kinetic analysis, the angles and moments of hip, knee and ankle joints were investigated. Results. The chair height has great influence on knee joint and hip joint moments, but less on ankle joints. In the third trimester for all chair heights, because of a marked increase in abdominal depth, the maximum hip moment is significantly less than that in first trimester, while the maximum knee moment is significantly larger. Pregnant women in third trimester produced larger knee moment during sit-to-stand transition from lower chair height. Conclusion. The mechanism of sit-to-stand is affected by the physical changes of pregnant women at different periods of pregnancy, e.g. increased loading of knee joint and decreased hip joint moment, especially in the last trimester period of pregnancy. Relevance - It is suggested that pregnant women in third trimester use a higher chair to decrease joint loading during chair-rise.

AB - Objective. This study was performed to determine the biomechanics of chair rising by pregnant women. Design. Relative body joint position and ground reaction forces were measured by a motion analysis system and one force plate. Background. Physiological and psychological changes during pregnancy impose postural demands and limit the performance of daily living activities such as rising from sitting to standing position. Methods. Twenty-four pregnant women, divided into three groups, were studied performing sit-to-stand transition from an armless and adjustable chair. By kinematic and kinetic analysis, the angles and moments of hip, knee and ankle joints were investigated. Results. The chair height has great influence on knee joint and hip joint moments, but less on ankle joints. In the third trimester for all chair heights, because of a marked increase in abdominal depth, the maximum hip moment is significantly less than that in first trimester, while the maximum knee moment is significantly larger. Pregnant women in third trimester produced larger knee moment during sit-to-stand transition from lower chair height. Conclusion. The mechanism of sit-to-stand is affected by the physical changes of pregnant women at different periods of pregnancy, e.g. increased loading of knee joint and decreased hip joint moment, especially in the last trimester period of pregnancy. Relevance - It is suggested that pregnant women in third trimester use a higher chair to decrease joint loading during chair-rise.

UR - http://www.scopus.com/inward/record.url?scp=0035113495&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035113495&partnerID=8YFLogxK

U2 - 10.1016/S0268-0033(00)00114-5

DO - 10.1016/S0268-0033(00)00114-5

M3 - Article

VL - 16

SP - 194

EP - 198

JO - Clinical Biomechanics

JF - Clinical Biomechanics

SN - 0268-0033

IS - 3

ER -