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Acute response of net muscle protein balance reflects 24-h balance after exercise and amino acid ingestion
Metabolism Unit, Shriners Hospitals for Children, Galveston 77550; and Department of Surgery, The University of Texas Medical Branch, Galveston, Texas 77555 The purpose of this study was to determine if the acute anabolic muscle response to resistance exercise and essential amino acids (EAA) reflect...
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Published in: | American journal of physiology: endocrinology and metabolism 2003-01, Vol.284 (1), p.E76-E89 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Metabolism Unit, Shriners Hospitals for Children, Galveston
77550; and Department of Surgery, The University of Texas Medical
Branch, Galveston, Texas 77555
The
purpose of this study was to determine if the acute anabolic muscle
response to resistance exercise and essential amino acids (EAA)
reflects the response over 24 h. Seven subjects participated in
the following two 24-h studies: 1 ) resting (REST) and
2 ) rest plus resistance exercise and consumption of EAA
(ES). Net balance (NB) across the leg was determined for four amino
acids. [ 13 C 6 ]phenylalanine was infused to
determine mixed muscle fractional synthetic rate (FSR).
Twenty-four-hour FSR was significantly greater for ES than for REST
( P = 0.003). Exchange of phenylalanine across the leg
was 194 ± 74 (SE) mg for ES and 371 ± 88 mg for REST ( P = 0.07) over 24 h and 229 ± 42 mg (ES)
and 28 ± 15 mg (REST; P |
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ISSN: | 0193-1849 1522-1555 |
DOI: | 10.1152/ajpendo.00234.2002 |