The impact of old age on skeletal muscle energetics: Supply and demand

David W. Russ, Ian R Lanza

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Properly functioning skeletal muscle is critical for locomotion and performance of many activities of daily living. Muscle wasting and decreased function of skeletal muscle are important factors in many age-related morbidities. There are several pathways for generating ATP in skeletal muscle that allow adequate ATP supply to meet increased demand during muscle activity. A growing body of literature provides evidence that the aging process may be accompanied by changes in metabolic supply and demand during muscle contractions. Herein, we review a body of evidence that several pathways of ATP synthesis (anaerobic glycolysis, oxidative phosphorylation) may be impaired in aging skeletal muscle as well as several underlying molecular and cellular mechanisms. However, detrimental effects of aging on muscle energy metabolism are not universally accepted, particularly when physical inactivity is accounted for. We discuss this important concept as well as several potential countermeasures that may compress the period of morbidity in old age. In the second half of this review, we discuss how energetic demand of skeletal muscle is affected by aging, with specific focus on basal and contractile ATPase activity.

Original languageEnglish (US)
Pages (from-to)234-247
Number of pages14
JournalCurrent Aging Science
Volume4
Issue number3
StatePublished - Dec 2011

Fingerprint

Skeletal Muscle
Adenosine Triphosphate
Muscles
Morbidity
Oxidative Phosphorylation
Glycolysis
Locomotion
Activities of Daily Living
Muscle Contraction
Energy Metabolism
Adenosine Triphosphatases

Keywords

  • ATPase
  • Fatigue
  • Glycolysis
  • Mitochondria
  • Oxidative phosphorylation
  • SERCA

ASJC Scopus subject areas

  • Aging
  • Geriatrics and Gerontology

Cite this

The impact of old age on skeletal muscle energetics : Supply and demand. / Russ, David W.; Lanza, Ian R.

In: Current Aging Science, Vol. 4, No. 3, 12.2011, p. 234-247.

Research output: Contribution to journalArticle

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