Effects of short-term resistance training on muscle strength and morphology in the elderly

David E.T. O'Neill, Robert E. Thayer, Albert W. Taylor, Tomasz M. Dzialoszynski, Earl G. Noble

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Ten moderately active participants (8 women, 2 men; mean age 66.3 ± 1.2 years), engaged in 8 weeks of isotonic knee-extensor resistance training. Afterward, peak torque output (180°/s) and mean power increased 30.8% and 27.2%, respectively, in the experimental limb (EL). A moderate, nonsignificant cross-over training effect was observed in the contralateral untrained limb (CL) for the same measures. Whereas mean fiber cross-sectional area (CSA) was unaltered in the CL by training, Fiber Types I and lIb in the EL displayed increased CSA. However, mean CSAs for all fiber types in the trained EL were no larger (p > .05) than those observed in the CL before or after training. There were no significant changes in muscle-fiber-type composition, the proportion of Type I myosin heavy chain, or Type IIa CSA. These data suggest that short-term resistance training can significantly increase isokinetic peak torque in the elderly, with minimal changes in the histochemical and biochemical parameters examined.

Original languageEnglish
Pages (from-to)312-324
Number of pages13
JournalJournal of Aging and Physical Activity
Volume8
Issue number4
DOIs
Publication statusPublished - Jan 1 2000

Keywords

  • Fiber cross-sectional area
  • Fiber type
  • One-legged training

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Rehabilitation
  • Gerontology
  • Geriatrics and Gerontology

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