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Aging of human muscle: structure, function and adaptability

M M Porter1, A A Vandervoort, J Lexell

  • 1Faculty of Kinesiology, University of Western Ontario, London, Canada.

Scandinavian Journal of Medicine & Science in Sports
|June 1, 1995
PubMed
Summary
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Aging human skeletal muscles lose volume and strength due to reduced motor units and fiber size. High-resistance strength training can combat age-related muscle weakness and improve mobility in older adults.

Area of Science:

  • Gerontology
  • Exercise Physiology
  • Neuromuscular Science

Background:

  • Skeletal muscle aging leads to decreased volume, motor units, and fiber size, particularly Type 2 fibers.
  • This results in progressive weakening and impaired mobility in older adults.
  • Understanding these changes is crucial for promoting healthy aging.

Purpose of the Study:

  • To review the effects of aging on the human neuromuscular system.
  • To describe mechanisms underlying age-related muscle atrophy.
  • To emphasize the importance of strength training for improving muscle function in older individuals.

Main Methods:

  • This is a review article.
  • It synthesizes current knowledge on neuromuscular aging.
  • Focuses on the role of strength training.

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Main Results:

  • Aging causes significant changes in muscle structure and function.
  • Strength training demonstrates potential to reverse some age-related muscle loss.
  • Exercise is vital for maintaining function in the elderly.

Conclusions:

  • Age-related muscle decline is a complex process affecting motor units and muscle fibers.
  • High-resistance strength training is a key intervention to mitigate sarcopenia.
  • Promoting physical activity is essential for the growing elderly population.