Document Detail

Measuring movement fluency during the sit-to-walk task.
MedLine Citation:
PMID:  23122898     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Restoring movement fluency is a key focus for physical rehabilitation; it's measurement, however, lacks objectivity. The purpose of this study was to find whether measurable movement fluency variables differed between groups of adults with different movement abilities whilst performing the sit-to-walk (STW) movement. The movement fluency variables were: (1) hesitation during movement (reduction in forward velocity of the centre of mass; CoM), (2) coordination (percentage of temporal overlap of joint rotations) and (3) smoothness (number of inflections in the CoM jerk signal).
METHODS: Kinematic data previously collected for another study were extracted for three groups: older adults (n=18), older adults at risk of falling (OARF, n=18), and younger adults (n=20). Each subject performed the STW movement freely while a motion analysis system tracked 11 body segments. The fluency variables were derived from the processed kinematic data and tested for group variation using analysis of variance.
FINDINGS: All three variables showed statistically significant differences among the groups. Hesitation (F=15.11, p<0.001) was greatest in the OARF 47.5% (SD 18.0), compared to older adults 30.3% (SD 15.9) and younger adults 20.8% (SD 11.4). Co-ordination (F=44.88, p<0.001) was lowest for the OARF (6.93%, SD 10.99) compared to both the young (31.21%, SD 5.48) and old (26.24%, SD 5.84). Smoothness (F=35.96, p<0.001) was best in the younger adults, 18.3 (SD 5.2) inflections, compared to the old, 42.5 (SD 11.5) and OARF, 44.25 (SD 7.29).
INTERPRETATION: Hesitation, co-ordination and smoothness may be valid indicators of movement fluency in adults, with important consequences for research and clinical practice.
A Kerr; V P Pomeroy; P J Rowe; P Dall; D Rafferty
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Publication Detail:
Type:  Journal Article     Date:  2012-11-01
Journal Detail:
Title:  Gait & posture     Volume:  37     ISSN:  1879-2219     ISO Abbreviation:  Gait Posture     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-03-29     Completed Date:  2013-09-16     Revised Date:  2014-02-20    
Medline Journal Info:
Nlm Unique ID:  9416830     Medline TA:  Gait Posture     Country:  England    
Other Details:
Languages:  eng     Pagination:  598-602     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Elsevier B.V. All rights reserved.
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MeSH Terms
Accidental Falls
Aged, 80 and over
Ataxia / diagnosis*
Biomechanical Phenomena
Case-Control Studies
Movement / physiology*
Posture / physiology*
Walking / physiology*
Grant Support
MC_G1002453//Medical Research Council

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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