Effects of stimulation frequency, amplitude, and impulse width on muscle fatigue

Muscle & Nerve
Michael BehringerJoachim Mester

Abstract

We investigated the effect of stimulation intensity (in percent of maximal tolerated stimulation current, mTSC), frequency, and impulse width on muscle fatigue. Using a randomized crossover design, 6 parameter combinations (80% mTSC, 80 Hz, 400 μs; 60% mTSC, 80 Hz, 400 μs; 80% mTSC, 20 Hz, 400 μs; 60% mTSC, 20 Hz, 400 μs; 80% mTSC, 80 Hz, 150 μs; 60% mTSC, 80 Hz, 150 μs) were tested in both legs of 13 athletic men (age 26 ± 2.3). The slope of the linear regression line over all tetani (FIS) and the number of tetani whose force was above 50% of the initial tetanus (FIN) were used to quantify fatigue. FIS and FIN were significantly lower in high-frequency protocols. No effects on FIS and FIN were found for intensity and impulse width. Stimulation frequency, but not impulse width or intensity, affected fatigue kinetics.

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Citations

Feb 23, 2020·Neuromodulation : Journal of the International Neuromodulation Society·Vahab Nekoukar
Feb 12, 2020·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Emily N AinsleyDavid F Collins
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Nov 24, 2017·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Maria Vromans, Pouran D Faghri
Oct 28, 2021·Science Translational Medicine·Marion BadiSilvestro Micera

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