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Related Concept Videos

Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

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The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
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Motor Unit Stimulation01:20

Motor Unit Stimulation

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When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
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  11. Increased Deep Muscle Activity With Interference Low-frequency Electrical Muscle Stimulation: Evaluation By Positron Emission Tomography

Increased deep muscle activity with interference low-frequency electrical muscle stimulation: evaluation by positron emission tomography

Yuichi Nishikawa1, Junsuke Nakase2, Takuya Sengoku3

  • 1Faculty of Frontier Engineering, Institute of Science & Engineering, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan. yuichi@se.kanazawa-u.ac.jp.

European Journal of Applied Physiology
|June 12, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Low-frequency electrical muscle stimulation (EMS) effectively boosts glucose metabolism in both deep and superficial muscles. This study used FDG-PET to confirm EMS benefits for trunk, pelvis, and lower extremity muscles.

Area of Science:

  • Exercise Physiology
  • Medical Imaging
  • Rehabilitation Science

Background:

  • The impact of electrical muscle stimulation (EMS) on deep muscle contraction and metabolism remains under-investigated.
  • Understanding EMS effects is crucial for optimizing therapeutic and training applications.

Purpose of the Study:

  • To investigate if low-frequency interference EMS enhances muscle metabolism in deep tissues.
  • Utilize [18F]-fluorodeoxyglucose positron emission tomography (FDG-PET) for metabolic assessment.

Main Methods:

  • 16 healthy males were divided into EMS and control groups.
  • The EMS group received daily low-frequency interference EMS for three days, with FDG-PET imaging on the final day.
  • Skeletal muscle metabolism was quantified using standardized uptake value (SUV) from FDG-PET scans.
Keywords:
Electrical muscle stimulationInterference waveMuscle activityPET

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A Murine Model of Muscle Training by Neuromuscular Electrical Stimulation
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Published on: May 9, 2012

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Main Results:

  • The EMS group exhibited significantly higher glucose metabolism compared to the control group.
  • Increased FDG uptake was observed in both superficial and deep muscles of the trunk, pelvis, and lower extremities.

Conclusions:

  • Low-frequency interference EMS appears to be an effective method for increasing glucose metabolism in a wide range of muscles.
  • This finding supports the potential of EMS as an intervention for muscle conditioning and rehabilitation.