Bed rest and myopathies.

Abstract:

PURPOSE OF REVIEW:The loss of skeletal muscle with injury or critical illness can be dramatic. This review emphasizes the importance of skeletal muscle as a metabolic reserve. Changes in protein metabolism with bed rest alone and during physiological stress are discussed. Nutritional and hormonal interventions that ameliorate the loss of skeletal muscle are highlighted. RECENT FINDINGS:The loss of skeletal muscle that occurs with inactivity alone can be prevented by nutritional supplementation with an essential amino acid formula. Bed rest with accompanying hypercortisolemia produces a threefold greater loss of skeletal muscle than bed rest alone. Essential amino acids stimulate muscle anabolism during acute hypercortisolemia; however, their effects during chronic hypercortisolemia must be explored. SUMMARY:Skeletal muscle loss with trauma or critical illness is due in great part to the interaction of bed rest (muscular inactivity) and stress (hypercortisolemia). Younger individuals respond to nutritional and pharmacological interventions during bed rest alone. Given a lower relative lean mass in the elderly and the importance of skeletal muscle as a metabolic reserve during stress, it is understandable that clinical outcomes are worse in older patients. Countermeasures to the loss of skeletal muscle, especially in the stressed patient, must be developed.

authors

Ferrando AA,Paddon-Jones D,Wolfe RR

doi

10.1097/01.mco.0000232901.59168.e9

subject

Has Abstract

pub_date

2006-07-01 00:00:00

pages

410-5

issue

4

eissn

1363-1950

issn

1473-6519

pii

00075197-200607000-00012

journal_volume

9

pub_type

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