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Changes in neuromuscular function after training by functional electrical stimulation.

Tanguy Marqueste1, François Hug, Patrick Decherchi

  • 1Institut Fédératif de Recherches Jean Roche (IFR 11), Faculté de Médecine Nord, Université de la Méditerranée (Aix-Marseille II), Boulevard Pierre Dramard, 13916 Marseille, France.

Muscle & Nerve
|July 23, 2003
PubMed
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Functional electrical stimulation (FES) training significantly enhanced neuromuscular function and maximal voluntary contraction (MVC) in human muscles, with benefits persisting for six weeks post-training. This improvement was particularly notable in the flexor digitorum brevis (FDB) muscle.

Area of Science:

  • Neuromuscular Physiology
  • Rehabilitation Science
  • Exercise Physiology

Background:

  • Functional electrical stimulation (FES) is a technique used to elicit muscle contractions.
  • Understanding the long-term effects of FES on neuromuscular function is crucial for rehabilitation.
  • Previous research has explored acute effects, but sustained benefits require further investigation.

Purpose of the Study:

  • To investigate the impact of a 6-week FES training program on rectus femoris (RF) and flexor digitorum brevis (FDB) neuromuscular function.
  • To determine if the observed effects of FES persist after a 6-week detraining period.

Main Methods:

  • Participants underwent a 6-week FES training protocol.
  • Muscle force, surface electromyogram, and M-wave characteristics were measured during sustained submaximal contractions.

Related Experiment Videos

  • Maximal voluntary contraction (MVC) and endurance time were assessed before, immediately after FES, and 6 weeks post-FES.

    • Main Results:

    • FES training led to significant increases in MVC for both RF (+14%) and FDB (+13%), which were maintained 6 weeks after training cessation.
    • Endurance time to exhaustion increased significantly in FDB (+18%) following FES, with sustained benefits.
    • FES attenuated the decrease in median frequency (MF) and the increase in root mean square (RMS) during sustained contractions, indicating improved muscle activation and fatigue resistance, particularly in FDB.

    Conclusions:

    • FES training effectively enhances neuromuscular function, including MVC and endurance, in human skeletal muscles.
    • The benefits of FES on muscle function and central activation are long-lasting, persisting for at least 6 weeks post-training.
    • FES appears to be a promising intervention for improving muscle performance and potentially aiding recovery in various clinical populations.