Document Detail


Spatiotemporal characteristics of spontaneous overground walk-to-run transition.
MedLine Citation:
PMID:  18760925     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of the current study was to examine spontaneous overground walk-to-run transitions (WRT). For the first time, subjects' WRT was examined during an overground protocol that allowed them to accelerate freely. The overground speed profile prior to reaching the WRT was analysed together with the spatiotemporal characteristics of the actual transition. Nine women (height: 166.4+/-3.5 cm) performed five spontaneous WRT. Speed, step frequency (SF) and step length (SL) of the accelerating walking steps and the transition step were determined. By means of fourth degree polynomials, subjects' spatiotemporal profiles prior to reaching WRT were determined. A step length index (SLI) was used to calculate the contribution of SF and SL to the increase in walking speed. Subjects took on average 5.9+/-0.9 walking steps prior to reaching transition. When speeding up towards the transition to running, subjects chose to accelerate predominantly in the first half of the walking acceleration period, followed by smaller speed increments in the second half. The SLI values indicated that subjects tended to increase walking speed by increasing SL, more than SF, except during the first 20% of the acceleration period. WRT-speed was 2.664+/-0.230 m s(-1), which was higher than in former treadmill studies using a constant acceleration protocol (+/-2.1 m s(-1)). Subjects made a speed jump of 0.417 m s(-1) from the last walking step to the WRT-step. We can conclude that further transition studies studying the interaction between the acceleration and gait transition behaviour are necessary in order to complete the understanding of the transition phenomenon.
Authors:
K De Smet; V Segers; M Lenoir; D De Clercq
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-08-29
Journal Detail:
Title:  Gait & posture     Volume:  29     ISSN:  0966-6362     ISO Abbreviation:  Gait Posture     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2008-12-22     Completed Date:  2009-03-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9416830     Medline TA:  Gait Posture     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  54-8     Citation Subset:  IM    
Affiliation:
Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences, Ghent University, Watersportlaan 2, B-9000 Ghent, Belgium.
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MeSH Terms
Descriptor/Qualifier:
Acceleration
Adult
Analysis of Variance
Biomechanics
Female
Humans
Locomotion / physiology
Running / physiology*
Time Factors
Walking / physiology*

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