[Conditions for indefatiguability of skeletal muscles].
Studies in rats with indirect stimulation of the m. triepssurae showed that the muscle worked for scores of hours without any signs of fatigue. Such working ability of the neuro-muscular apparatus (NMA) is only possible if the loads do not exceed 0.15-0.20 of the maximal tetanic strength, and the stimulation frequency is about 40/sec. Such parameters of stimulation permite to achieve unfatiguability of muscle in isometric contraction regimen. The constant amplitude of action potentials during the whole period of work, and quick relaxation of the contracting muscle working for many hours indicate the intensity of electric and metabolic processes in the muscle.
D000818:Animals; D005260:Female; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*; D051381:Rats
Ob usloviiakh neutomliaemosti skeletnykh myshts