Does knee motion contribute to feet-in-place balance recovery?

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Although knee motions have been observed at loss of balance, the ankle and hip strategies have remained the focus of past research. The present study aimed to investigate whether knee motions contribute to feet-in-place balance recovery. This was achieved by experimentally monitoring knee motions during recovery from forward falling, and by simulating balance recovery movements with and without knee joint as the main focus of the study. Twelve participants initially held a straight body configuration and were released from different forward leaning positions. Considerable knee motions were observed especially at greater leaning angles. Simulations were performed using 3-segment (feet, shanks+thighs, and head+arms+trunk) and 4-segment (with separate shanks and thighs segments) planar models. Movements were driven by joint torque generators depending on joint angle, angular velocity, and activation level. Optimal joint motions moved the mass center projection to be within the base of support without excessive joint motion. The 3-segment model (without knee motions) generated greater backward linear momentum and had better balance performance, which confirmed the advantage of having only ankle/hip strategies. Knee motions were accompanied with less body angular momentum and a lower body posture, which could be beneficial for posture control and reducing falling impact, respectively.

Original languageEnglish
Pages (from-to)1873-1880
Number of pages8
JournalJournal of Biomechanics
Volume49
Issue number9
DOIs
Publication statusPublished - 2016 Jun 14

Fingerprint

Foot
Knee
Recovery
Joints
Angular momentum
Angular velocity
Momentum
Torque
Thigh
Chemical activation
Posture
Ankle
Hip
Monitoring
Knee Joint
Arm
Head
Research

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation

Cite this

@article{25b2bf303cba4bad9e1a63d93d6d0a81,
title = "Does knee motion contribute to feet-in-place balance recovery?",
abstract = "Although knee motions have been observed at loss of balance, the ankle and hip strategies have remained the focus of past research. The present study aimed to investigate whether knee motions contribute to feet-in-place balance recovery. This was achieved by experimentally monitoring knee motions during recovery from forward falling, and by simulating balance recovery movements with and without knee joint as the main focus of the study. Twelve participants initially held a straight body configuration and were released from different forward leaning positions. Considerable knee motions were observed especially at greater leaning angles. Simulations were performed using 3-segment (feet, shanks+thighs, and head+arms+trunk) and 4-segment (with separate shanks and thighs segments) planar models. Movements were driven by joint torque generators depending on joint angle, angular velocity, and activation level. Optimal joint motions moved the mass center projection to be within the base of support without excessive joint motion. The 3-segment model (without knee motions) generated greater backward linear momentum and had better balance performance, which confirmed the advantage of having only ankle/hip strategies. Knee motions were accompanied with less body angular momentum and a lower body posture, which could be beneficial for posture control and reducing falling impact, respectively.",
author = "Cheng, {Kuangyou B.}",
year = "2016",
month = "6",
day = "14",
doi = "10.1016/j.jbiomech.2016.04.026",
language = "English",
volume = "49",
pages = "1873--1880",
journal = "Journal of Biomechanics",
issn = "0021-9290",
publisher = "Elsevier Limited",
number = "9",

}

Does knee motion contribute to feet-in-place balance recovery? / Cheng, Kuangyou B.

In: Journal of Biomechanics, Vol. 49, No. 9, 14.06.2016, p. 1873-1880.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Does knee motion contribute to feet-in-place balance recovery?

AU - Cheng, Kuangyou B.

PY - 2016/6/14

Y1 - 2016/6/14

N2 - Although knee motions have been observed at loss of balance, the ankle and hip strategies have remained the focus of past research. The present study aimed to investigate whether knee motions contribute to feet-in-place balance recovery. This was achieved by experimentally monitoring knee motions during recovery from forward falling, and by simulating balance recovery movements with and without knee joint as the main focus of the study. Twelve participants initially held a straight body configuration and were released from different forward leaning positions. Considerable knee motions were observed especially at greater leaning angles. Simulations were performed using 3-segment (feet, shanks+thighs, and head+arms+trunk) and 4-segment (with separate shanks and thighs segments) planar models. Movements were driven by joint torque generators depending on joint angle, angular velocity, and activation level. Optimal joint motions moved the mass center projection to be within the base of support without excessive joint motion. The 3-segment model (without knee motions) generated greater backward linear momentum and had better balance performance, which confirmed the advantage of having only ankle/hip strategies. Knee motions were accompanied with less body angular momentum and a lower body posture, which could be beneficial for posture control and reducing falling impact, respectively.

AB - Although knee motions have been observed at loss of balance, the ankle and hip strategies have remained the focus of past research. The present study aimed to investigate whether knee motions contribute to feet-in-place balance recovery. This was achieved by experimentally monitoring knee motions during recovery from forward falling, and by simulating balance recovery movements with and without knee joint as the main focus of the study. Twelve participants initially held a straight body configuration and were released from different forward leaning positions. Considerable knee motions were observed especially at greater leaning angles. Simulations were performed using 3-segment (feet, shanks+thighs, and head+arms+trunk) and 4-segment (with separate shanks and thighs segments) planar models. Movements were driven by joint torque generators depending on joint angle, angular velocity, and activation level. Optimal joint motions moved the mass center projection to be within the base of support without excessive joint motion. The 3-segment model (without knee motions) generated greater backward linear momentum and had better balance performance, which confirmed the advantage of having only ankle/hip strategies. Knee motions were accompanied with less body angular momentum and a lower body posture, which could be beneficial for posture control and reducing falling impact, respectively.

UR - http://www.scopus.com/inward/record.url?scp=84992303746&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84992303746&partnerID=8YFLogxK

U2 - 10.1016/j.jbiomech.2016.04.026

DO - 10.1016/j.jbiomech.2016.04.026

M3 - Article

VL - 49

SP - 1873

EP - 1880

JO - Journal of Biomechanics

JF - Journal of Biomechanics

SN - 0021-9290

IS - 9

ER -