Strength and fatigue of lumbar extensor muscles in older adults

Devinder Kaur Ajit Singh, Martin Bailey, Raymond Lee

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Introduction: Loss of lumbar extensor muscle strength and fatigue resistance may contribute to functional disability. Methods: Two groups of subjects were recruited: young (n = 26, 20-35 years of age) and old (n = 26, ≥65 years of age) adults. Lumbar extensor muscle strength was measured with a load cell, and electromyographic activities were recorded to study muscle fatigue at 60% of maximum voluntary contraction. Results: We found that the muscle moments generated by the extensor muscles decreased with age (P < 0.05). Aging was associated with a significant increase in the power of the lower frequency band (101-200 Hz) of the electromyographic signals (P < 0.05), but the spectral characteristics did not appear to change with sustained contraction (P > 0.05). Conclusions: The changes in strength and spectral properties of the electromyographic signals of lumbar extensor muscles may be related to age-related alterations in muscle fiber composition and recruitment. These changes should be considered in clinical functional task evaluation.

Original languageEnglish
Pages (from-to)74-79
Number of pages6
JournalMuscle and Nerve
Volume44
Issue number1
DOIs
Publication statusPublished - Jul 2011

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Fatigue
Muscles
Muscle Fatigue
Muscle Strength

Keywords

  • Aging
  • Electromyography
  • Lumbar extensor muscles
  • Muscle fatigue
  • Muscle strength

ASJC Scopus subject areas

  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Physiology (medical)
  • Physiology

Cite this

Strength and fatigue of lumbar extensor muscles in older adults. / Ajit Singh, Devinder Kaur; Bailey, Martin; Lee, Raymond.

In: Muscle and Nerve, Vol. 44, No. 1, 07.2011, p. 74-79.

Research output: Contribution to journalArticle

Ajit Singh, Devinder Kaur ; Bailey, Martin ; Lee, Raymond. / Strength and fatigue of lumbar extensor muscles in older adults. In: Muscle and Nerve. 2011 ; Vol. 44, No. 1. pp. 74-79.
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