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Wave summation
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Paradigms of Lower Extremity Electrical Stimulation Training After Spinal Cord Injury
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Effect of Superimposed Electromyostimulation on Back Extensor Strengthening: A Pilot Study.

Jae Hyeon Park1, Kwan Sik Seo, Shi-Uk Lee

  • 11Department of Rehabilitation Medicine, College of Medicine, Seoul National University, Seoul, South Korea; 2Department of Rehabilitation Medicine, Seoul National University Hospital, Seoul, South Korea; and 3Department of Rehabilitation Medicine, Seoul National University Boramae Medical Center, Seoul, South Korea.

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|February 4, 2016
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Supervising electromyostimulation (EMS) with voluntary contraction (VC) may enhance back extensor strength. This pilot study found EMS provided a potential additional benefit for increasing strength and endurance, though not statistically significant compared to sham stimulation.

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Area of Science:

  • Exercise Physiology
  • Neuromuscular Electrical Stimulation

Background:

  • Electromyostimulation (EMS) superimposed on voluntary contraction (VC) is known to increase muscle strength.
  • Limited research exists on the effects of superimposed EMS on back extensor strengthening.

Purpose of the Study:

  • To investigate the impact of superimposed EMS on enhancing back extensor strength in healthy adults.
  • To evaluate the combined effect of EMS and voluntary exercise on muscular strength and endurance.

Main Methods:

  • Twenty healthy men (20-29 years) participated in a 2-week back extension exercise program.
  • Participants were divided into an EMS group and a sham stimulation (SS) group.
  • Both groups performed back extension exercises with either superimposed EMS or SS, focusing on paraspinal muscles.

Main Results:

  • Both groups demonstrated significant increases in peak torque and endurance after the 2-week intervention (p ≤ 0.05).
  • A medium effect size was observed for both strength and endurance between the EMS and SS groups.
  • No statistically significant difference in outcomes was found between the two groups.

Conclusions:

  • Two weeks of back extensor strengthening exercise effectively improved both strength and endurance.
  • Superimposing EMS during back extensor strengthening exercise may offer an additional benefit for increasing muscle strength and endurance.