The Relations between Variability and Muscle Fatigue in Prototype Movements


Authors: I. Vlčková 1;  A. Krobot 2
Authors‘ workplace: Katedra rehabilitačních oborů, Fakulta zdravotních studií, Západočeská univerzita v Plzni 1;  Rehabilitační oddělení, Fakultní nemocnice Olomouc 2
Published in: Rehabil. fyz. Lék., 26, 2019, No. 2, pp. 68-73.
Category: Original Papers

Overview

Muscle fatigue represents wide-ranging phenomenon involving peripheral, central and also cognitive factors. At the central level, it leads to a collapse of neurotransmitter regulation and so the motor learning process can become significantly beneficial for restoration of the system under pressure. Because of ensuring variable behaviour, we enable the motor patterns to adapt effectively to specific requirements of an external and internal environment, without changing the objective or intention of the movement.

In our experiment we try to evaluate objectively the impact of cognitive functions on progression and regression of muscle fatigue. To evaluate this issue adequately, a physically demanding posture – a squat Wall Sit, has been chosen from a range of prototype movements. Wall Sit provides information about muscle capability depending on time and also offers findings about variability of the engagement of lower limbs muscle group during the beginning of muscle fatigue.

On the basis of the relation dogma between variability and muscle fatigue, we confirm the difference at the level of statistical significance (p < 0,05), when regarding the time during influence of cognitive load, the performance improved. The results of the experiment confirm a significant and at the same time positive impact of an external focus of attention, when we confirmed delay in the beginning of muscle fatigue.

Keywords:

central fatigue – cognitive task – attentional focus effect – squat Wall Sit


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Labels
Physiotherapist, university degree Rehabilitation Sports medicine
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