Effect of voluntary contraction with electrical stimulation antagonist muscle on agonist H-reflex

Tomofumi Yamaguchi, Shigeo Tanabe, T. Watanabe, Y. Muraoka

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Objective: Hybrid exercise (HE) was designed to use the force generated by an electrically stimulated antagonist to provide resistance to a volitionally contracting agonist. The purpose of this study was to measure and compare the soleus H-reflex before and after HE or conventional resistance exercise (CRE). Methods: The experiments were carried out in 18 healthy subjects (5 men and 13 women; 19-30 yr), who were divided into 2 groups of 9 for each protocol (HE or CRE). The exercise sessions lasted for 15 consecutive minutes. The soleus Hmax/Mmax was measured before and after the HE or the CRE. Results: In the HE group, although there was no significant difference, the soleus Hmax/Mmax after the exercise increased compared with before the exercise (54.7 ± 10.2% to 59.0 ± 14.5%). On the other hand, the soleus Hmax/Mmax decreased in the CRE group (61.8 ± 14.9% to 55.7 ± 16.1%). In the rate of change of the soleus Hmax/Mmax, the result for the HE group was significantly higher than in the CRE group (108.0 ± 11.7% and 89.1 ± 8.0%, respectively) (p < 0.001). Conclusion: Our results show a clear difference of the neurophysiological mechanism between HE and CRE. Thus, HE might not be an alternative method for CRE.

Original languageEnglish
Pages (from-to)251-255
Number of pages5
JournalElectromyography and Clinical Neurophysiology
Volume47
Issue number4-5
Publication statusPublished - 01-07-2007
Externally publishedYes

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H-Reflex
Electric Stimulation
Exercise
Muscles

All Science Journal Classification (ASJC) codes

  • Physiology
  • Clinical Neurology
  • Physiology (medical)

Cite this

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title = "Effect of voluntary contraction with electrical stimulation antagonist muscle on agonist H-reflex",
abstract = "Objective: Hybrid exercise (HE) was designed to use the force generated by an electrically stimulated antagonist to provide resistance to a volitionally contracting agonist. The purpose of this study was to measure and compare the soleus H-reflex before and after HE or conventional resistance exercise (CRE). Methods: The experiments were carried out in 18 healthy subjects (5 men and 13 women; 19-30 yr), who were divided into 2 groups of 9 for each protocol (HE or CRE). The exercise sessions lasted for 15 consecutive minutes. The soleus Hmax/Mmax was measured before and after the HE or the CRE. Results: In the HE group, although there was no significant difference, the soleus Hmax/Mmax after the exercise increased compared with before the exercise (54.7 ± 10.2{\%} to 59.0 ± 14.5{\%}). On the other hand, the soleus Hmax/Mmax decreased in the CRE group (61.8 ± 14.9{\%} to 55.7 ± 16.1{\%}). In the rate of change of the soleus Hmax/Mmax, the result for the HE group was significantly higher than in the CRE group (108.0 ± 11.7{\%} and 89.1 ± 8.0{\%}, respectively) (p < 0.001). Conclusion: Our results show a clear difference of the neurophysiological mechanism between HE and CRE. Thus, HE might not be an alternative method for CRE.",
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Effect of voluntary contraction with electrical stimulation antagonist muscle on agonist H-reflex. / Yamaguchi, Tomofumi; Tanabe, Shigeo; Watanabe, T.; Muraoka, Y.

In: Electromyography and Clinical Neurophysiology, Vol. 47, No. 4-5, 01.07.2007, p. 251-255.

Research output: Contribution to journalArticle

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