Protein metabolism and physical training: any need for amino acid supplementation?
Nutrire Rev. Soc. Bras. Aliment. Nutr
;
41: 1-17, Dec. 2016. tab, ilus
Artigo
em Inglês
| LILACS
| ID: biblio-880303
ABSTRACT
Muscle mass is the major deposit of protein molecules with dynamic turnover between net protein synthesis and degradation. In human subjects, invasive and non-invasive techniques have been applied to determine their skeletal muscle catabolism of amino acids at rest, during and after different forms of physical exercise and training. The aim of this review is to analyse the turnover flux and the relative oxidation rate of different types of muscle proteins after one bout of exercise as well as after resistance and endurance condition of training. Protein feeding in athletes appears to be a crucial nutrition necessity to promote the maintenance of muscle mass and its adaptation to the need imposed by the imposed technical requirements. In resting human individuals, there commended protein daily allowance is about 0.8 g (dry weight) kg−body weight per 24 h knowing that humans are unable to accumulate protein stores in muscle tissues. Nevertheless, practical feeding recommendations related to regular exercise practice are proposed to athletes by different bodies in order to foster their skills and performance. This review will examine the results obtained under endurance and resistance type of exercise while consuming single or repeated doses of various ingestions of protein products (full meat, essential amino acids, specific amino acids and derivatives, vegetarian food). From the scientific literature, it appears that healthy athletes(and heavy workers) should have a common diet of 1.25 g kg−24 h to compensate the exercise training muscle protein degradation and their resyn thesis within the following hours. A nitrogen-balance assay would berecommended to avoid any excessive intake of protein. Eventually, a daily equilibrated food intake would beof primer importance versus inadequate absorption of some specific by-products.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Exercício Físico
/
Aminoácidos
/
Proteínas Musculares
Tipo de estudo:
Guia de Prática Clínica
Limite:
Adolescente
/
Adulto
/
Criança
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Nutrire Rev. Soc. Bras. Aliment. Nutr
Assunto da revista:
Ciências da Nutrição
Ano de publicação:
2016
Tipo de documento:
Artigo
País de afiliação:
Bélgica
Instituição/País de afiliação:
Université Libre de Bruxelles/BE
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