Performance Fatigability: Mechanisms and Task Specificity

Performance fatigability is characterized as an acute decline in motor performance caused by an exercise-induced reduction in force or power of the involved muscles. Multiple mechanisms contribute to performance fatigability and originate from neural and muscular processes, with the task demands dic...

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Published in:Cold Spring Harbor perspectives in medicine 2018-07, Vol.8 (7), p.a029728
Main Author: Hunter, Sandra K
Format: Article
Language:English
Subjects:
Aging - physiology
Athletic Performance - physiology
Female
Humans
Male
Motor Neurons - physiology
Muscle Contraction - physiology
Muscle Fatigue - physiology
Muscle, Skeletal - physiology
Psychomotor Performance - physiology
Sex Characteristics
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description Performance fatigability is characterized as an acute decline in motor performance caused by an exercise-induced reduction in force or power of the involved muscles. Multiple mechanisms contribute to performance fatigability and originate from neural and muscular processes, with the task demands dictating the mechanisms. This review highlights that (1) inadequate activation of the motoneuron pool can contribute to performance fatigability, and (2) the demands of the task and the physiological characteristics of the population assessed, dictate fatigability and the involved mechanisms. Examples of task and population differences in fatigability highlighted in this review include contraction intensity and velocity, stability and support provided to the fatiguing limb, sex differences, and aging. A future challenge is to define specific mechanisms of fatigability and to translate these findings to real-world performance and exercise training in healthy and clinical populations across the life span.
doi_str_mv 10.1101/cshperspect.a029728
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subjects Aging - physiology
Athletic Performance - physiology
Female
Humans
Male
Motor Neurons - physiology
Muscle Contraction - physiology
Muscle Fatigue - physiology
Muscle, Skeletal - physiology
Psychomotor Performance - physiology
Sex Characteristics
title Performance Fatigability: Mechanisms and Task Specificity
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