Protecting muscle mass and function in older adults during bed rest

Kirk L. English, Douglas Paddon-Jones

Research output: Contribution to journalReview article

200 Scopus citations

Abstract

PURPOSE OF REVIEW: To highlight the losses in muscle mass, strength, power, and functional capacity incurred in older adults during bed rest-mediated inactivity and to provide practical recommendations for both the prevention and rehabilitation of these losses. RECENT FINDINGS: In addition to sarcopenic muscle loss, older adults lose lean tissue more rapidly than the young during prolonged periods of physical inactivity. Amino acid or protein supplementation has the potential to maintain muscle protein synthesis and may reduce inactivity-induced muscle loss, but should ideally be part of an integrated countermeasure regimen consisting of nutrition, exercise, and, when appropriate, pharmacologic interventions. SUMMARY: In accordance with recent mechanistic advances, we recommend an applied, broad-based two-phase approach to limit inactivity-mediated losses of muscle mass and function in older adults: (i) Lifestyle: consume a moderate amount (25-30 g) of high-quality protein with each meal and incorporate habitual exercise in close temporal proximity to protein-containing meals; (ii) Crises: react aggressively to combat the accelerated loss of muscle mass and function during acute catabolic crises and periods of reduced physical activity. As a base strategy, this should include nutritional support such as targeted protein or amino acid supplementation and integrated physical therapy.

Original languageEnglish (US)
Pages (from-to)34-39
Number of pages6
JournalCurrent Opinion in Clinical Nutrition and Metabolic Care
Volume13
Issue number1
DOIs
StatePublished - Jan 1 2010

Keywords

  • Aging
  • Inactivity
  • Muscle protein synthesis
  • Nutrition
  • Sarcopenia

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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