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Vieillissement, activité physique et apprentissage moteur : effets de la complexité de la tâche.

Abstract : Human aging is characterized by a decrease in both efficiency and speed of cognitive and sensory-motor processes. However, the dynamic of ageing is not the same for all the individuals. Some factors, linked to the way of life such as regular physical exercise, could modulate the aging effects. The aim of this dissertation is to examine under which conditions maintaining a physically active life-style could compensate for the age-related declines in the learning of a new motor-skill. More precisely, the effects of task complexity and the conditions under which the learning must be expressed were studied.
Three experiments studied the interactive effects of age and regular physical exercise on the learning of visual-motor pointing-movements on a moving target. The target displacements were governed by probabilistic rules and different target sizes implied different accuracy constraints. Learning was assessed in a reactive task where participants' response speed was stressed (experiment 1 and 2), and in a prediction task without any temporal constraint (experiment 3).
The main results revealed a beneficial effect of physical exercise on this skill learning, selective to the elderly and to conditions of high constraints on response execution. The age-related effect would be due to speed-stress conditions and to response complexity. The positive effects of physical exercise on the cognitive function of older adults would be related to motor efficiency improvement.
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Contributor : Cédric Albinet <>
Submitted on : Wednesday, February 15, 2006 - 11:28:02 AM
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Cédric Albinet. Vieillissement, activité physique et apprentissage moteur : effets de la complexité de la tâche.. domain_other. Université Paul Sabatier - Toulouse III, 2004. Français. ⟨tel-00011614⟩

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