TITLE

Variability of gait patterns during unconstrained walking assessed by satellite positioning (GPS)

AUTHOR(S)
Terrier, Philippe; Schutz, Yves
PUB. DATE
November 2003
SOURCE
European Journal of Applied Physiology;Nov2003, Vol. 90 Issue 5/6, p554
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
It is established that the ratio between step length (SL) and step frequency (SF) is constant over a large range of walking speed. However, few data are available about the spontaneous variability of this ratio during unconstrained outdoor walking, in particular over a sufficient number of steps. The purpose of the present study was to assess the inter- and intra-subject variability of spatio-temporal gait characteristics [SL, SF and walk ratio (WR=SL/SF)] while walking at different freely selected speeds. Twelve healthy subjects walked three times along a 100-m athletic track at: (1) a slower than preferred speed, (2) preferred speed and (3) a faster than preferred speed. Two professional GPS receivers providing 3D positions assessed the walking speed and SF with high precision (less than 0.5% error). Intra-subject variability was calculated as the variation among eight consecutive 5-s samples. WR was found to be constant at preferred and fast speeds [0.41 (0.04) m·s and 0.41 (0.05) m·s respectively] but was higher at slow speeds [0.44 (0.05) m·s]. In other words, between slow and preferred speed, the speed increase was mediated more by a change in SF than SL. The intra-subject variability of WR was low under preferred [CV, coefficient of variation = 1.9 (0.6)%] and fast [CV=1.8 (0.5)%] speed conditions, but higher under low speed condition [CV=4.1 (1.5)%]. On the other hand, the inter-subject variability of WR was 11%, 10% and 12% at slow, preferred and fast walking speeds respectively. It is concluded that the GPS method is able to capture basic gait parameters over a short period of time (5 s). A specific gait pattern for slow walking was observed. Furthermore, it seems that the walking patterns in free-living conditions exhibit low intra-individual variability, but that there is substantial variability between subjects.
ACCESSION #
16821547

 

Related Articles

  • You be the scientist.  // Current Science;12/15/95 1 of 2, Vol. 81 Issue 8, p7 

    Points out the coordinated movements of the legs and arms when walking. Effect of varying natural leg and arm rhythm.

  • Fluctuations in human’s walking. Obata, T.; Ohyama, T.; Shimada, J.; Oshima, H.; Hara, H.; Fujita, S. // AIP Conference Proceedings;2000, Vol. 519 Issue 1, p720 

    © 2000 American Institute of Physics.

  • Modulation of soleus H-reflexes during gait in healthy children. Hodapp, M.; Klisch, C.; Berger, W.; Mall, V.; Faist, M. // Experimental Brain Research;Mar2007, Vol. 178 Issue 2, p252 

    During locomotion spinal short latency reflexes are rhythmically modulated and depressed compared to rest. In adults this modulation is severely disturbed after bilateral spinal lesions indicating a role for supra-spinal control. Soleus reflex amplitudes are large in the stance phase and...

  • ANÁLISIS DEL PERFIL DE USUARIO DE UN CENTRO NORDIC WALKING QUE INCORPORA LAS NUEVAS TENDENCIAS EN EL WELLNESS. Martínez-Lemos, Iván Rodolfo // Motricidad: European Journal of Human Movement;Jun2013, Vol. 30, p73 

    Nordic Walking is walking with the aid of two poles specially designed and making a rhythmic movement of arm swing, very similar to normal gait cycle but of greater amplitude. As overall exercise activates a large number of muscle groups, however its practitioners refer low-perceived effort....

  • WALKING DOWNHILL: THE TRADE-OFF BETWEEN ENERGETICS AND STABILITY. Hendrix, Emily; Hunter, Lindsay; Dean, Jesse // Conference Proceedings of the Annual Meeting of the American Soc;2010, p92 

    The article discusses a study of the trade-off between energetics and stability during downhill walking. The researchers simulated a dynamic walking model in which they predicted that increased slope would reduce the needed actuation and decrease stability. They found that steeper slopes...

  • Test-retest reliability of an insole plantar pressure system to assess gait along linear and curved trajectories. Godi, Marco; Turcato, Anna Maria; Schieppati, Marco; Nardone, Antonio // Journal of NeuroEngineering & Rehabilitation (JNER);2014, Vol. 11 Issue 1, p1 

    Background Previous studies have assessed reliability of insole technology for evaluating foot pressure distribution during linear walking. Since in natural motion straight walking is intermingled with turns, we determined the test-retest reliability of insole assessment for curved as well as...

  • Ankle extensor proprioceptors contribute to the enhancement of the soleus EMG during the stance phase of human walking. Grey, Michael J.; Mazzaro, Nazarena; Nielsen, Jens Bo; Sinkjær, Thomas // Canadian Journal of Physiology & Pharmacology;Aug2004, Vol. 82 Issue 8/9, p610 

    A rapid plantar flexion perturbation applied to the ankle during the stance phase of the step cycle during human walking unloads the ankle extensors and produces a marked decline in the soleus EMG. This demonstrates that sensory activity contributes importantly to the enhancement of the ankle...

  • Characterization of a System for Studying Human Gait During Slope Walking. Lay, Andrea N.; Hass, Chris J.; Smith, D. Webb; Gregor, Robert J. // Journal of Applied Biomechanics;May2005, Vol. 21 Issue 2, p153 

    Sloped walking surfaces provide a unique environment for examining the biomechanics and neural control of locomotion. While sloped surfaces have been used in a variety of studies in recent years, the current literature provides little if any discussion of the integrity, i.e., validity, of the...

  • The strategies to regulate and to modulate the propulsive forces during gait initiation in lower limb amputees. Michel, V.; Chong, R. // Experimental Brain Research;Oct2004, Vol. 158 Issue 3, p356 

    We used the framework of motor program adaptability to examine how unilateral above-knee (AK) or below-knee (BK) amputee subjects organize the global and local biomechanical processes of generation of the propulsive forces during gait initiation to overcome the segmental and neuro-muscular...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics