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Effect of light finger touch on postural sway after lower-limb muscular fatigue

Identifieur interne : 007022 ( Main/Exploration ); précédent : 007021; suivant : 007023

Effect of light finger touch on postural sway after lower-limb muscular fatigue

Auteurs : Nicolas Vuillerme [France] ; Vincent Nougier [France]

Source :

RBID : Pascal:04-0129495

Descripteurs français

English descriptors

Abstract

Objective: To investigate whether a light finger touch can compensate for the increased postural sway induced by lower-limb muscular fatigue. Design: Before-after trials. Setting: General community. Participants: Nine healthy university students (mean age, 23,8±2.6y; mean body weight, 72.7±6.9kg; mean height, 177.2±7.5cm). Interventions: Participants stood with their feet together and eyes closed. They were asked to sway as little as possible in 4 conditions: no fatigue/no touch, no fatigue/touch, fatigue/no touch, and fatigue/touch. Calf muscle fatigue was induced by having participants stand on their toes until exhaustion. Touch conditions involved a gentle light touch with the right index finger on a nearby surface at waist height. Main Outcome Measure: Center of pressure displacements were recorded by using a force platform. Results: Light finger touch resulted in decreased postural sway in the no-fatigue and fatigue conditions. Interestingly, this stabilizing effect was more accentuated in the fatigue condition. Conclusions: Results suggest that the contribution of the haptic cues from the finger for regulating postural sway increases after muscular fatigue. These findings could have implications in clinical and rehabilitative areas.

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Le document en format XML

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<div type="abstract" xml:lang="en">Objective: To investigate whether a light finger touch can compensate for the increased postural sway induced by lower-limb muscular fatigue. Design: Before-after trials. Setting: General community. Participants: Nine healthy university students (mean age, 23,8±2.6y; mean body weight, 72.7±6.9kg; mean height, 177.2±7.5cm). Interventions: Participants stood with their feet together and eyes closed. They were asked to sway as little as possible in 4 conditions: no fatigue/no touch, no fatigue/touch, fatigue/no touch, and fatigue/touch. Calf muscle fatigue was induced by having participants stand on their toes until exhaustion. Touch conditions involved a gentle light touch with the right index finger on a nearby surface at waist height. Main Outcome Measure: Center of pressure displacements were recorded by using a force platform. Results: Light finger touch resulted in decreased postural sway in the no-fatigue and fatigue conditions. Interestingly, this stabilizing effect was more accentuated in the fatigue condition. Conclusions: Results suggest that the contribution of the haptic cues from the finger for regulating postural sway increases after muscular fatigue. These findings could have implications in clinical and rehabilitative areas.</div>
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