Effect of slip on movement of body center of mass relative to base of support

Jia Yuan You, You Li Chou, Chii-Jeng Lin, Fong-chin Su

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

Objective. The purpose is to investigate the effect of balance conditions and slippery perturbation on the position and velocity of the body's center of mass relative to the body's base of support. Design. Twenty-two young and healthful subjects were investigated while their walk was perturbed by a soap patch applied over a force plate. A safety harness was used to prevent the subject from falling on knee or buttock. Background. Appropriate postural response to meet physiological biomechanical requirements is mandatory in restoration of balance upon slip. Methods. Twenty-two healthy subjects dressed with safety harness walked first without and then with slippery perturbation, guided by a metronome at 120 steps/min and 90 steps/min cadence. Data were collected from a motion analysis system and force plates. Results. For slippery perturbation, the displacement and velocity of center of mass with respect to base of support became smaller from heel strike to contralateral toe off. Subject's balance condition correlated significantly to the displacement of center of mass with respect to base of support (r=-0.51 at 120 steps/min and r=-0.471 at 90 steps/min), as well as the velocity (r=-0.834 at 120 steps/min, r=-0.673 at 90 steps/min) at contralateral toe off. Conclusions. For slip during walking, smaller excursion and faster velocity of center of mass with respect to base of support were important for subjects regaining balance from heel strike to contralateral toe off. The critical time for subjects regaining stability is the first double support phase of the gait cycle. Relevance. It is confirmed that two variables, the displacement and the velocity of center of mass with respect to base of support, are valuable biomechanical factors and provide quantifiable determination for investigation of the balance condition in slipping.

Original languageEnglish
Pages (from-to)167-173
Number of pages7
JournalClinical Biomechanics
Volume16
Issue number2
DOIs
Publication statusPublished - 2001 Feb 20

Fingerprint

Toes
Heel
Accidental Falls
Safety
Soaps
Buttocks
Gait
Walking
Knee
Healthy Volunteers

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Orthopedics and Sports Medicine

Cite this

@article{75270dd59dd64cc58f851ab44223d527,
title = "Effect of slip on movement of body center of mass relative to base of support",
abstract = "Objective. The purpose is to investigate the effect of balance conditions and slippery perturbation on the position and velocity of the body's center of mass relative to the body's base of support. Design. Twenty-two young and healthful subjects were investigated while their walk was perturbed by a soap patch applied over a force plate. A safety harness was used to prevent the subject from falling on knee or buttock. Background. Appropriate postural response to meet physiological biomechanical requirements is mandatory in restoration of balance upon slip. Methods. Twenty-two healthy subjects dressed with safety harness walked first without and then with slippery perturbation, guided by a metronome at 120 steps/min and 90 steps/min cadence. Data were collected from a motion analysis system and force plates. Results. For slippery perturbation, the displacement and velocity of center of mass with respect to base of support became smaller from heel strike to contralateral toe off. Subject's balance condition correlated significantly to the displacement of center of mass with respect to base of support (r=-0.51 at 120 steps/min and r=-0.471 at 90 steps/min), as well as the velocity (r=-0.834 at 120 steps/min, r=-0.673 at 90 steps/min) at contralateral toe off. Conclusions. For slip during walking, smaller excursion and faster velocity of center of mass with respect to base of support were important for subjects regaining balance from heel strike to contralateral toe off. The critical time for subjects regaining stability is the first double support phase of the gait cycle. Relevance. It is confirmed that two variables, the displacement and the velocity of center of mass with respect to base of support, are valuable biomechanical factors and provide quantifiable determination for investigation of the balance condition in slipping.",
author = "You, {Jia Yuan} and Chou, {You Li} and Chii-Jeng Lin and Fong-chin Su",
year = "2001",
month = "2",
day = "20",
doi = "10.1016/S0268-0033(00)00076-0",
language = "English",
volume = "16",
pages = "167--173",
journal = "Clinical Biomechanics",
issn = "0268-0033",
publisher = "Elsevier Limited",
number = "2",

}

Effect of slip on movement of body center of mass relative to base of support. / You, Jia Yuan; Chou, You Li; Lin, Chii-Jeng; Su, Fong-chin.

In: Clinical Biomechanics, Vol. 16, No. 2, 20.02.2001, p. 167-173.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of slip on movement of body center of mass relative to base of support

AU - You, Jia Yuan

AU - Chou, You Li

AU - Lin, Chii-Jeng

AU - Su, Fong-chin

PY - 2001/2/20

Y1 - 2001/2/20

N2 - Objective. The purpose is to investigate the effect of balance conditions and slippery perturbation on the position and velocity of the body's center of mass relative to the body's base of support. Design. Twenty-two young and healthful subjects were investigated while their walk was perturbed by a soap patch applied over a force plate. A safety harness was used to prevent the subject from falling on knee or buttock. Background. Appropriate postural response to meet physiological biomechanical requirements is mandatory in restoration of balance upon slip. Methods. Twenty-two healthy subjects dressed with safety harness walked first without and then with slippery perturbation, guided by a metronome at 120 steps/min and 90 steps/min cadence. Data were collected from a motion analysis system and force plates. Results. For slippery perturbation, the displacement and velocity of center of mass with respect to base of support became smaller from heel strike to contralateral toe off. Subject's balance condition correlated significantly to the displacement of center of mass with respect to base of support (r=-0.51 at 120 steps/min and r=-0.471 at 90 steps/min), as well as the velocity (r=-0.834 at 120 steps/min, r=-0.673 at 90 steps/min) at contralateral toe off. Conclusions. For slip during walking, smaller excursion and faster velocity of center of mass with respect to base of support were important for subjects regaining balance from heel strike to contralateral toe off. The critical time for subjects regaining stability is the first double support phase of the gait cycle. Relevance. It is confirmed that two variables, the displacement and the velocity of center of mass with respect to base of support, are valuable biomechanical factors and provide quantifiable determination for investigation of the balance condition in slipping.

AB - Objective. The purpose is to investigate the effect of balance conditions and slippery perturbation on the position and velocity of the body's center of mass relative to the body's base of support. Design. Twenty-two young and healthful subjects were investigated while their walk was perturbed by a soap patch applied over a force plate. A safety harness was used to prevent the subject from falling on knee or buttock. Background. Appropriate postural response to meet physiological biomechanical requirements is mandatory in restoration of balance upon slip. Methods. Twenty-two healthy subjects dressed with safety harness walked first without and then with slippery perturbation, guided by a metronome at 120 steps/min and 90 steps/min cadence. Data were collected from a motion analysis system and force plates. Results. For slippery perturbation, the displacement and velocity of center of mass with respect to base of support became smaller from heel strike to contralateral toe off. Subject's balance condition correlated significantly to the displacement of center of mass with respect to base of support (r=-0.51 at 120 steps/min and r=-0.471 at 90 steps/min), as well as the velocity (r=-0.834 at 120 steps/min, r=-0.673 at 90 steps/min) at contralateral toe off. Conclusions. For slip during walking, smaller excursion and faster velocity of center of mass with respect to base of support were important for subjects regaining balance from heel strike to contralateral toe off. The critical time for subjects regaining stability is the first double support phase of the gait cycle. Relevance. It is confirmed that two variables, the displacement and the velocity of center of mass with respect to base of support, are valuable biomechanical factors and provide quantifiable determination for investigation of the balance condition in slipping.

UR - http://www.scopus.com/inward/record.url?scp=0035133699&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035133699&partnerID=8YFLogxK

U2 - 10.1016/S0268-0033(00)00076-0

DO - 10.1016/S0268-0033(00)00076-0

M3 - Article

C2 - 11222936

AN - SCOPUS:0035133699

VL - 16

SP - 167

EP - 173

JO - Clinical Biomechanics

JF - Clinical Biomechanics

SN - 0268-0033

IS - 2

ER -