Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Effects of age-related gait changes on the biomechanics of slips and falls.

Authors
Lockhart-TE; Woldstad-JC; Smith-JL
Source
Ergonomics 2003 Oct; 46(12):1136-1160
NIOSHTIC No.
20036260
Abstract
A laboratory study was conducted to examine gait changes associated with aging and the effect of these changes on initiation of slips and frequency of falls utilizing newly defined biomechanical parameters of slips and falls. Twenty-eight participants from two age groups (young and old) walked around a circular track at a comfortable pace wearing a safety harness. A slippery floor surface was placed on the walking track over the force plate at random time intervals without the participants awareness. Synchronized kinetic and kinematic measurements were obtained on both slippery and non-slippery walking surfaces. The results indicated that older participants' horizontal heel contact velocity was significantly faster, step length was significantly shorter, and transitional acceleration of the whole body centre-of-mass (COM) was significantly slower than younger participants. Older participants' initial friction demand, as measured by required coefficient of friction (RCOF), was not significantly different than their younger counterparts. Additionally, older participants slipped longer and faster, and fell more often than younger participants. A comparison of horizontal heel contact velocity for participants who fell with participants who did not fall indicated that, in general, fallers horizontal heel contact velocity was faster than non-fallers. However, a comparison of RCOF for participants who fell with participants who did not fall suggested that RCOF was not a totally deterministic factor influencing actual fall events. These findings suggest that gait changes associated with aging (especially higher horizontal heel contact velocity and slower transition of the whole body COM) affect initiation of slip-induced falls.
Keywords
Fall-protection; Biomechanics; Biomechanical-engineering; Laboratories; Laboratory-equipment; Laboratory-work; Laboratory-workers; Hazardous-materials; Hazardous-waste-cleanup; Hazards; Safety-climate; Safety-engineering; Safety-equipment; Safety-measures; Safety-monitoring; Safety-personnel; Safety-practices; Safety-programs; Author Keywords: Slips and falls; Gait; Biomechanics; Aging; Friction demand; Slip distances; Heel velocity; Coefficient of friction
Contact
T.E. Lockhart, Grado Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
Publication Date
20031010
Document Type
Journal Article
Email Address
lockhart@vt.edu
Funding Type
Grant
Fiscal Year
2004
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-K01-OH-007450
Issue of Publication
12
ISSN
1366-5847
Priority Area
Work Environment and Workforce: Special Populations
Source Name
Ergonomics
State
OR; TX; VA
Performing Organization
Virginia Polytechnic Institute and State University
TOP