Low Carb É Realmente Melhor Para Composição Corporal?

[yuuuriiii 1045]

 

 

Pelo que vi o Ricardo já postou o link do estudo, mas aqui vai de novo:

https://examine.com/nutrition/low-fat-vs-low-carb-for-weight-loss/

 

https://jamanetwork.com/journals/jama/article-abstract/2673150

[Dawkinator 49]

O que dizem deste?

 

''DEPOIS DA FASE DE ADAPTAÇÃO DIETAS LOW CARB TRANSFORMAM ATLETAS EM INCINERADOR DE GORDURA''

 

Endurance athletes who have been on a low-carbohydrate diet for quite some time will burn considerably more fat than endurance athletes with a traditional carbohydrate-rich diet. Even at an intensity where their muscles can not derive their energy from fat according to the textbooks, these athletes mainly burn fat. American sports scientist Jeff Volek reported this in Metabolism in 2016.

 

 

Study
Volek studied 20 well-trained endurance athletes. Some of them were ultrarunners, some Ironman triathletes. Ten athletes followed a traditional diet: 60 percent of their energy came from carbohydrates, 15 percent from protein and 25 percent from fat. Ten other athletes had switched autonomously to a low-carbohydrate diet at least 9 months earlier: 70 percent of their energy came from fat, 20 percent from protein and the remaining 10 percent from carbohydrates.

 

Results
Volek had his test subjects run on a treadmill with increasing intensity. For the athletes who followed a traditional diet, fat burning was maximal at an intensity of 55 percent of the VO2max. With more intensive exercise, the muscles had to burn more carbohydrates. That is more or less in accordance with the textbooks.

 

The athletes who followed a low-carbohydrate diet, however, burned most fats per minute at an intensity of 70 percent of the VO2max. And that is definitely not in accordance with the textbooks.

 

 

 

On another occasion, Volek let his subjects run for 3 hours with an intensity of 64 percent of their VO2max. Just before that, the subjects were given a shake with a nutritional profile that was consistent with their diet.

 

The low-carbohydrate athletes mainly burned fat, the carbohydrate athletes mainly burned carbohydrates.

 

 

 

Before and after this test, Volek determined the glycogen concentration in the muscle cells of the athletes. This concentration was - contrary to what you might expect - almost identical in both groups of athletes. After endurance efforts, muscle cells recover optimally if they contain sufficient glycogen.

 

 

 

Conclusion

"These results provide the first documentation of the metabolic adaptations associated with long-term consumption of a very low-carbohydrate/high-fat diet in highly trained keto-adapted ultra-endurance athletes", Volek wrote. "The enhanced ability to oxidize fat during exercise across a range of intensities is striking, as is the ability to maintain 'normal' glycogen concentrations in the context of limited carbohydrate intake."

 

 

"Keto-adaptation provides an alternative to the supremacy of the high-carbohydrate paradigm for endurance athletes."

 

Source:
Metabolism. 2016 Mar;65(3):100-10.

[krebz 3755]

23 horas atrás, Dawkinator disse:

O que dizem deste?

 

''DEPOIS DA FASE DE ADAPTAÇÃO DIETAS LOW CARB TRANSFORMAM ATLETAS EM INCINERADOR DE GORDURA''

 

Endurance athletes who have been on a low-carbohydrate diet for quite some time will burn considerably more fat than endurance athletes with a traditional carbohydrate-rich diet. Even at an intensity where their muscles can not derive their energy from fat according to the textbooks, these athletes mainly burn fat. American sports scientist Jeff Volek reported this in Metabolism in 2016.

 

 

Study
Volek studied 20 well-trained endurance athletes. Some of them were ultrarunners, some Ironman triathletes. Ten athletes followed a traditional diet: 60 percent of their energy came from carbohydrates, 15 percent from protein and 25 percent from fat. Ten other athletes had switched autonomously to a low-carbohydrate diet at least 9 months earlier: 70 percent of their energy came from fat, 20 percent from protein and the remaining 10 percent from carbohydrates.

 

Results
Volek had his test subjects run on a treadmill with increasing intensity. For the athletes who followed a traditional diet, fat burning was maximal at an intensity of 55 percent of the VO2max. With more intensive exercise, the muscles had to burn more carbohydrates. That is more or less in accordance with the textbooks.

 

The athletes who followed a low-carbohydrate diet, however, burned most fats per minute at an intensity of 70 percent of the VO2max. And that is definitely not in accordance with the textbooks.

 

 

 

On another occasion, Volek let his subjects run for 3 hours with an intensity of 64 percent of their VO2max. Just before that, the subjects were given a shake with a nutritional profile that was consistent with their diet.

 

The low-carbohydrate athletes mainly burned fat, the carbohydrate athletes mainly burned carbohydrates.

 

 

 

Before and after this test, Volek determined the glycogen concentration in the muscle cells of the athletes. This concentration was - contrary to what you might expect - almost identical in both groups of athletes. After endurance efforts, muscle cells recover optimally if they contain sufficient glycogen.

 

 

 

Conclusion

"These results provide the first documentation of the metabolic adaptations associated with long-term consumption of a very low-carbohydrate/high-fat diet in highly trained keto-adapted ultra-endurance athletes", Volek wrote. "The enhanced ability to oxidize fat during exercise across a range of intensities is striking, as is the ability to maintain 'normal' glycogen concentrations in the context of limited carbohydrate intake."

 

 

"Keto-adaptation provides an alternative to the supremacy of the high-carbohydrate paradigm for endurance athletes."

 

Source:
Metabolism. 2016 Mar;65(3):100-10.

Da uma lida em algumas paginas atrás, Volek é um dos pesquisadores que financia pesquisas low-carb e sempre da resultados maravilhosos para low carb...

 

Por sinal, ele tambem tem livros e se nao me engano uma empresa(nao lembro de cabeca se era ele ou outro vendedor) vendendo a ideia low-carb

[mpcosta82 2966]

Em 02/03/2018 em 03:01, Dawkinator disse:

O que dizem deste?

 

''DEPOIS DA FASE DE ADAPTAÇÃO DIETAS LOW CARB TRANSFORMAM ATLETAS EM INCINERADOR DE GORDURA''

 

 Coma mais gordura e o corpo usará mais gordura como fonte de combustível; coma mais carboidrato e o corpo usará mais glicose. Simples assim.

 

O corpo queima mais gordura proporcionalmente, mas a energia fotos gasta é a mesma, ou seja, o saldo calórico é o mesmo.

[Born4Run 2165]

Nao entendo...essas "vantagens em endurance" nunca sao comprovadas na pratica.

Nao sei de nenhum grande maratonista que segue ...se fosse tao vantajoso seria ao contrario.

[mpcosta82 2966]

2 horas atrás, Born4Run disse:

Nao entendo...essas "vantagens em endurance" nunca sao comprovadas na pratica.

Nao sei de nenhum grande maratonista que segue ...se fosse tao vantajoso seria ao contrario.

Não existe vantagem para maratonas.

 

No entanto, em ultramaratonas é possível seguir uma dieta low carb e manter a performance, porque a intensidade é mais baixa do que em uma maratona, há paradas para comer, etc.

[Born4Run 2165]

3 horas atrás, mpcosta82 disse:

Não existe vantagem para maratonas.

 

No entanto, em ultramaratonas é possível seguir uma dieta low carb e manter a performance, porque a intensidade é mais baixa do que em uma maratona, há paradas para comer, etc.

Questiono isso tbm.

Ser possível é diferente de ser melhor.

[VictorS28 64]

To com uma duvida.

To fazendo bulking limpo, tenho 19% bf, porem pouquissima massa muscular.

Seria vantajoso focar nas gorduras e deixar o carbo de lado?

[SaBiih 4007]

7 minutos atrás, VictorS28 disse:

To com uma duvida.

To fazendo bulking limpo, tenho 19% bf, porem pouquissima massa muscular.

Seria vantajoso focar nas gorduras e deixar o carbo de lado?

Com esse BF, eu não faria bulking, mesmo que limpo.

Maaaaaaaaas, se quiser continuar bulkando, eu não trocaria os carbos por gordura, apenas controlaria o superavit de calorias para bem pouca coisa acima da TMB, já que o BF está relativamente alto.

[VictorS28 64]

6 minutos atrás, SaBiih disse:

Com esse BF, eu não faria bulking, mesmo que limpo.

Maaaaaaaaas, se quiser continuar bulkando, eu não trocaria os carbos por gordura, apenas controlaria o superavit de calorias para bem pouca coisa acima da TMB, já que o BF está relativamente alto.

Entendi, valeu mano.

estava pensando, se eu fizer cutting, vou ficar só cabeça e orelha kkkkk