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Colegio de Medicos y Cirujanos República de Costa Rica

2015, Number 615

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Rev Med Cos Cen 2015; 72 (615)

Mecanismos fisiológicos de la fatiga neuromuscular

Arce RE

Language: Spanish
References: 12
Page: 461-464
PDF size: 160.19 Kb.


ABSTRACT

The term fatigue is commonly used to describe a reversible decreased performance or an increase in the real or perceived difficulty to accomplish a physical activity. Often understood as the inability to maintain a required level of muscular force, fatigue leads to stop the effort and depends on several variables. Fatigue is a complex and multifactorial phenomenon whose mechanisms are based on factors related to the exercise (exercise type, speed, duration of muscle contraction etc) and factors related to the individual during the exercise (energy reserves, sex, age, physical conditioning, emotional state, stress levels). Evidence indicates, when exercise is maximal or sub maximal, that fatigue comes from a neuromuscular decrease in force production after different physiological phenomena. To understand fatigue it is necessary to be clear about the physiology of skeletal muscle contraction. There are several mechanisms described explaining fatigue and its adaptive and protective properties. Fatigue is originated from peripheral and central pathways.


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