Trunk extensor muscles fatigue affects undisturbed postural control in young healthy adults.

Full Abstract

BACKGROUND:
The purpose of this study was to investigate the effects of trunk extensor muscles fatigue on undisturbed postural control in young healthy adults.

METHODS:
Fifteen university students were asked to stand upright as immobile as possible with their eyes closed in two conditions of Fatigue and No fatigue of the trunk extensor muscles. Muscular fatigue was achieved by performing trunk repetitive extensions until maximal exhaustion. Centre of foot pressure displacements, recorded using a force platform, were used to compute the motions of the vertical projection of the centre of gravity and those of the difference between the centre of pressure and those of the difference between the centre of pressure and the vertical projection of the centre of gravity. These motions were processed through space-time and frequency domain analyses.

FINDINGS:
Larger centre of pressure minus centre of gravity and centre of gravity motions in the Fatigue than No fatigue condition are observed along both the medio-lateral and antero-posterior axes, this effect being more accentuated along the antero-posterior axis.

INTERPRETATION:
The present findings suggest that trunk extensor muscles fatigue deteriorates undisturbed stance control, yielding, along the antero-posterior axis mainly, (1) a greater neuromuscular requirements for ensuring standing control, as indicated by the increased centre of pressure minus centre of gravity motions, and (2) a deterioration of postural performance, as indicated by the increased centre of gravity motions.

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Author information

Author/s: Vuillerme, Nicolas (N); Anziani, Baptiste (B); Rougier, Patrice (P);

Affiliation: Laboratoire TIMC-IMAG, UMR CNRS 5525, Faculté de Médecine, 38706 La Tronche cédex, France. nicolas.vuillerme(-atsign-)imag.fr

Journal and publication information

Publication Type: Journal Article

Journal: Clinical biomechanics (Bristol, Avon) (Clin Biomech (Bristol, Avon)), published in England. (Language: eng)

Reference: 2007-Jun; vol 22 (issue 5) : pp 489-94

Dates: Created 2007/05/02; Completed 2007/07/11; Revised 2008/11/21;

PMID: 17346866, status: MEDLINE (last retrieval date: 12/26/2008)

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adaptation, Physiological - physiology
Adult
Feedback - physiology
Female
Humans
Male

Muscle Contraction - physiology
Muscle Fatigue - physiology
Postural Balance - physiology
Posture - physiology
Psychomotor Performance - physiology
Thorax - physiology

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