Wide-pulse electrical stimulation of the quadriceps allows greater maximal evocable torque than conventional stimulation

Purpose The effectiveness of a neuromuscular electrical stimulation (NMES) program has been shown to be proportional to the maximal evocable torque (MET), which is potentially influenced by pulse characteristics such as duration and frequency. The aim of this study was to compare MET between convent...

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Bibliographic Details
Published in:European journal of applied physiology 2023-06, Vol.123 (6), p.1209-1214
Main Authors: Espeit, Loïc, Lapole, Thomas, Millet, Guillaume Y., Rozand, Vianney, Maffiuletti, Nicola A.
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Biomedicine
Electric Stimulation - methods
Electric Stimulation Therapy - methods
Electrical stimuli
Healthy Volunteers
Human Physiology
Humans
Muscle Contraction - physiology
Muscle, Skeletal - physiology
Neuromuscular electrical stimulation
Occupational Medicine/Industrial Medicine
Original Article
Quadriceps muscle
Quadriceps Muscle - physiology
Rehabilitation
Sports Medicine
Torque
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Summary:Purpose The effectiveness of a neuromuscular electrical stimulation (NMES) program has been shown to be proportional to the maximal evocable torque (MET), which is potentially influenced by pulse characteristics such as duration and frequency. The aim of this study was to compare MET between conventional and wide-pulse NMES at two different frequencies. Methods MET—expressed as a percentage of maximal voluntary contraction (MVC) torque—and maximal tolerable current intensity were quantified on 71 healthy subjects. The right quadriceps was stimulated with three NMES protocols using different pulse duration/frequency combinations: conventional NMES (0.2 ms/50 Hz; CONV), wide-pulse NMES at 50 Hz (1 ms/50 Hz; WP50) and wide-pulse NMES at 100 Hz (1 ms/100 Hz; WP100). The proportion of subjects reaching the maximal stimulator output (100 mA) before attaining maximal tolerable current intensity was also quantified. Results The proportion of subjects attaining maximal stimulator output was higher for CONV than WP50 and WP100 ( p  
ISSN:1439-6319
1439-6327
DOI:10.1007/s00421-023-05145-z