Dica de Saúde 21/08/2017 14:45

A restrição de carboidratos pode prejudicar a performance de atletas?

<p class="MsoNormal" style="text-align: justify; line-height: normal; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline;"><img src="http://unisaudems.org.br/fotos/201708211441371503340897.jpg" alt="" /></p> <p class="MsoNormal" style="text-align: justify; line-height: normal; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline;"><b><span style="font-size:16.0pt; mso-fareast-font-family:" times="" new="">A ingest&atilde;o correta de carboidratos, gorduras e prote&iacute;nas &eacute; necess&aacute;ria para o equil&iacute;brio do metabolismo muscular. Essa limita&ccedil;&atilde;o pode alterar nossa fisiologia hormonal, diz m&eacute;dico<o:p></o:p></span></b></p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline;"><span style="font-size:16.0pt;font-family:">Manter a composi&ccedil;&atilde;o corporal &eacute; essencial para a preserva&ccedil;&atilde;o da nossa sa&uacute;de metab&oacute;lica. A preven&ccedil;&atilde;o de um decl&iacute;nio na massa muscular requer que a s&iacute;ntese de prote&iacute;nas seja a mesma ou superior do que a taxa de degrada&ccedil;&atilde;o muscular. Sabemos que a ingest&atilde;o correta de carboidratos, gorduras e prote&iacute;nas &eacute; necess&aacute;ria para o equil&iacute;brio do metabolismo muscular.<o:p></o:p></span></p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: 1.25rem; line-height: inherit;" data-track-category="Link no Texto" data-track-links=""><span style="font-size:16.0pt;font-family:">Falando em m&uacute;sculos, a s&iacute;ntese de prote&iacute;nas &eacute; extremamente relacionada com a nossa din&acirc;mica hormonal. Essa s&iacute;ntese pode ser afetada pela insulina e outros v&aacute;rios horm&ocirc;nios, como o IGF-I, que &eacute; estimulado pelo horm&ocirc;nio do crescimento (horm&ocirc;nio esse contra-regulador da insulina).<o:p></o:p></span></p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: 1.25rem; line-height: inherit;" data-track-category="Link no Texto" data-track-links=""><span style="font-size:16.0pt;font-family:"><a href="http://globoesporte.globo.com/eu-atleta/saude/noticia/atividade-fisica-e-a-melhor-forma-de-manter-os-niveis-do-colesterol-sob-controle.ghtml" style="box-sizing: inherit;font-style:inherit;font-variant:inherit;font-stretch: inherit; font-size:inherit;line-height:inherit"><b><span style="color: rgb(255, 102, 0); border: 1pt none windowtext; padding: 0cm; text-decoration-line: none;">+ Atividade f&iacute;sica mant&eacute;m os n&iacute;veis do colesterol sob controle</span></b></a><o:p></o:p></span></p> <h2 style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit;"><span style="font-size:16.0pt;font-family:">O papel crucial da insulina na s&iacute;ntese muscular<o:p></o:p></span></h2> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit;"><span style="font-size:16.0pt; font-family:">Muitos dos efeitos metab&oacute;licos de uma dieta com baixo teor de carboidratos s&atilde;o atribu&iacute;dos &agrave; supress&atilde;o cr&ocirc;nica da insulina plasm&aacute;tica. A insulina &eacute; considerada um potente horm&ocirc;nio anab&oacute;lico, principalmente, atrav&eacute;s do seu papel na redu&ccedil;&atilde;o da prote&oacute;lise (quebra de prote&iacute;nas), mas tamb&eacute;m tem sido mostrado que a insulina pode auxiliar na estimula&ccedil;&atilde;o da s&iacute;ntese prot&eacute;ica.<o:p></o:p></span></p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: 1.25rem; line-height: inherit;" data-track-category="Link no Texto" data-track-links=""><span style="font-size:16.0pt;font-family:">De fato, o efeito da restri&ccedil;&atilde;o de carboidratos (low carb) combinado com alta ingest&atilde;o prot&eacute;ica pode alterar a secre&ccedil;&atilde;o de insulina, de GH e a sinaliza&ccedil;&atilde;o de IGF-I. A restri&ccedil;&atilde;o de carboidratos combinada com alta ingest&atilde;o de prote&iacute;nas diminui a secre&ccedil;&atilde;o di&aacute;ria de insulina plasm&aacute;tica. Em estudo publicado no Journal of Clinical Endocrinology, a concentra&ccedil;&atilde;o de insulina em 24 horas diminuiu em mais de 50% com uma dieta com baixo carboidrato (5% carboidrato, 60% gordura, 35% prote&iacute;na).<o:p></o:p></span></p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: 1.25rem; line-height: inherit;" data-track-category="Link no Texto" data-track-links=""><span style="font-size:16.0pt;font-family:"><a href="http://globoesporte.globo.com/eu-atleta/saude/noticia/saude-e-condicionamento-representam-o-primeiro-degrau-para-melhora-na-estetica.ghtml" style="box-sizing: inherit;font-style:inherit;font-variant:inherit;font-stretch: inherit; font-size:inherit;line-height:inherit"><b><span style="color: rgb(255, 102, 0); border: 1pt none windowtext; padding: 0cm; text-decoration-line: none;">+ Sa&uacute;de e condicionamento representam o primeiro degrau</span></b></a><o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size: 16pt; line-height: 107%; color: rgb(72, 72, 72); letter-spacing: -0.45pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Segundo a nutricionista Luna Azevedo, &ldquo;a ingest&atilde;o de carboidratos &eacute; importante especialmente para os atletas e indiv&iacute;duos sens&iacute;veis &agrave; insulina. Uma alimenta&ccedil;&atilde;o inadequada pode levar a perda da massa muscular e diminui&ccedil;&atilde;o do rendimento no esporte. Outro detalhe &eacute; que existem v&aacute;rios tipos de alimenta&ccedil;&atilde;o com diminui&ccedil;&atilde;o dos carboidratos que podem variar de 5 a 60%, por exemplo.&ldquo;</span><o:p></o:p></p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline;"><span style="font-size:16.0pt;font-family:"><a href="http://globoesporte.globo.com/eu-atleta/nutricao/noticia/dieta-do-alimento-em-po-que-restringe-carboidratos-e-indicada-para-atletas.ghtml"><b><span style="color: rgb(255, 102, 0); border: 1pt none windowtext; padding: 0cm; text-decoration-line: none;">+ Dieta do alimento em p&oacute; restringe carboidratos</span></b></a><o:p></o:p></span></p> <h2 style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit;"><span style="font-size:16.0pt;font-family:">Qual a import&acirc;ncia do carboidrato no p&oacute;s-treino?<o:p></o:p></span></h2> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit;"><span style="font-size:16.0pt; font-family:">&Eacute; sabido que a ingest&atilde;o de carboidratos + prote&iacute;nas diminui a velocidade de absor&ccedil;&atilde;o intestinal de amino&aacute;cidos quando comparado com a ingest&atilde;o apenas da prote&iacute;na. Mas, isso n&atilde;o parece impactar de fato a s&iacute;ntese muscular de prote&iacute;nas.<o:p></o:p></span></p> <p class="MsoNormal" style="text-align: justify; line-height: normal; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline;"><span style="font-size:16.0pt;mso-fareast-font-family: " times="" new="">A prote&iacute;na quando ingerida sozinha &eacute; devidamente digerida levando ao r&aacute;pido aumento das concentra&ccedil;&otilde;es plasm&aacute;ticas de amino&aacute;cidos nas primeiras duas horas. No entanto, quando consumida com carboidratos ocorre ascens&atilde;o p&oacute;s-prandial da insulina que facilita o anabolismo muscular por supress&atilde;o da prote&oacute;lise e aumento do fluxo sangu&iacute;neo microvascular. O aumento da insulina circulante at&eacute; 30 mU/L j&aacute; &eacute; suficiente para maximizar o anabolismo p&oacute;s-prandial.<o:p></o:p></span></p> <p class="MsoNormal" style="text-align: justify; line-height: normal; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline;"><b><span style="font-size:16.0pt;mso-fareast-font-family: " times="" new="">Outro detalhe &eacute; a qualidade do treinamento que faz toda diferen&ccedil;a quando realizada com acompanhento do profissional de educa&ccedil;&atilde;o f&iacute;sica. Vale lembrar a import&acirc;ncia da orienta&ccedil;&atilde;o do m&eacute;dico e do nutricionista, ambos em conjunto podem avaliar qual melhor padr&atilde;o alimentar a ser seguido.<o:p></o:p></span></b></p> <p class="MsoNormal" style="text-align: justify; line-height: normal; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline;"><span style="font-size:16.0pt;mso-fareast-font-family: " times="" new="">Muito se t&ecirc;m falado sobre o jejum no p&oacute;s treino. Mas essa estrat&eacute;gia n&atilde;o traz benef&iacute;cios musculares devido &agrave; eleva&ccedil;&atilde;o dos horm&ocirc;nios hiperglicemiantes (glucagon, cortisol e IGF-1) que favorecem o catabolismo muscular. Al&eacute;m disso h&aacute; baixa secre&ccedil;&atilde;o de insulina, que &eacute; um horm&ocirc;nio importante no anabolismo. Outro estudo mostra que a insulina atua na libera&ccedil;&atilde;o e absor&ccedil;&atilde;o de amino&aacute;cidos nos m&uacute;sculos.<o:p></o:p></span></p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline;"><span style="font-size:16.0pt;font-family:">Existe evid&ecirc;ncia de que ocorre maior s&iacute;ntese de prote&iacute;nas musculares quando h&aacute; libera&ccedil;&atilde;o da insulina aumentando a capta&ccedil;&atilde;o de glicose e dos amino&aacute;cidos nos m&uacute;sculos. Apesar das evid&ecirc;ncias, a avalia&ccedil;&atilde;o feita pelo m&eacute;dico do esporte deve ser individualizada para cada pessoa, tudo depender&aacute; do perfil metab&oacute;lico da pessoa e das suas estrat&eacute;gias pessoais e desportivas.<o:p></o:p></span></p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: 1.25rem; line-height: inherit;" data-track-category="Link no Texto" data-track-links="">&nbsp;</p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit;"><em style="box-sizing: inherit; font-variant:inherit;font-weight:inherit;font-stretch: inherit;font-size:inherit; line-height:inherit"><b><span style="font-size:16.0pt;font-family:" windowtext="" mso-border-alt:none="">*As informa&ccedil;&otilde;es e opini&otilde;es emitidas neste texto s&atilde;o de inteira responsabilidade do autor, n&atilde;o correspondendo, necessariamente, ao ponto de vista do Globoesporte.com / EuAtleta.com.</span></b></em></p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit;">&nbsp;</p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit;"><em>Fonte:(EuAtleta)</em></p> <p class="content-textcontainer" style="margin: 0cm 0cm 0.0001pt; text-align: justify; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; vertical-align: baseline; box-sizing: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: inherit;"><span style="font-size:16.0pt;font-family:"><o:p></o:p></span></p>

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