muscle fatigue


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Related to muscle fatigue: lactic acid, muscle soreness

mus·cle fa·tigue

(mus'ĕl fă-tēg')
A state of exhaustion or loss of strength and/or muscle endurance following strenuous activity associated with the accumulation of lactic acid in muscles.

muscle fatigue

The reduced capacity of a muscle to perform work as a result of repeated contractions and accumulation of lactic acid in anaerobic cell respiration. The fatigue may be partial or complete.
See also: fatigue

muscle fatigue

impairment of muscle force production or of shortening speed resulting from repeated and/or prolonged activity. Causes vary greatly according to the nature and duration of the effort. In all cases they appear to consist principally in disturbances of intramuscular biochemistry, differing substantially between circumstances. However, the possibility of contributory neural factors, resulting in reduced muscle activation, should never be overlooked. Note that cytoplasmic ATP concentrations never fall to less than about half resting levels in living muscle fibres (radical ATP depletion would lead to rigor, not weakness). See also central fatigue, glycogen.

mus·cle fa·tigue

(mus'ĕl fă-tēg')
A state of exhaustion or loss of strength and/or muscle endurance following strenuous activity associated with the accumulation of lactic acid in muscles.
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The major purpose of the current work was to investigate the effects of administering different pulse durations (200, 350, and 500 (s [P200, P350, and P500, respectively]) on EE and muscle fatigue during FES cycling in person with SCI.
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The linear techniques that are used to estimate muscle fatigue are based on linear regression, which relates changes in EMG parameters to changes in power loss (as a direct measurement of muscle fatigue).
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This edition incorporates information on cerebral blood flow during exercise, the anti-fatigue action of catecholamines during exercise, the role of metabosensitive nerve endings in muscle fatigue, the nutritional role of neuroglia, multiple mechanisms for glucose absorption, the pathophysiology of clubbing of fingers, the staircase phenomenon, REM sleep, and the high degree of coordination involved in ciliary activity in the respiratory tract.
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For students and new practitioners who use electromyography (EMG), including exercise scientists, physical and occupational therapists, and motor development specialists, this volume details the characteristics of the instrumentation (treated from a mathematical perspective), signal analysis techniques, and applications for biofeedback, back pain, sport activities, muscle fatigue, gait analysis, and other uses.
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