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Reduction And Recovery Of Self-Sustained Muscle Activity After Fatiguing Plantar Flexor Contractions, Anthony J. Blazevich, Ricardo N. O. Mesquita, Ronei S. Pinto, Timothy Pulverenti, Sébastien Ratel
Reduction And Recovery Of Self-Sustained Muscle Activity After Fatiguing Plantar Flexor Contractions, Anthony J. Blazevich, Ricardo N. O. Mesquita, Ronei S. Pinto, Timothy Pulverenti, Sébastien Ratel
Research outputs 2022 to 2026
Purpose: Persistent inward calcium and sodium currents (PICs) are crucial for initiation and maintenance of motoneuron firing, and thus muscular force. However, there is a lack of data describing the effects of fatiguing exercise on PIC activity in humans. We simultaneously applied tendon vibration and neuromuscular electrical stimulation (VibStim) before and after fatiguing exercise. VibStim induces self-sustained muscle activity that is proposed to result from PIC activation. Methods: Twelve men performed 5-s maximal isometric plantar flexor contractions (MVC) with 5-s rests until joint torque was reduced to 70%MVC. VibStim trials consisted of five 2-s trains of neuromuscular electrical stimulation (20 …