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Effects of carbohydrate and branched-chain amino acid beverage ingestion during acute upper body resistance exercise on performance and postexercise hormone response.
Smith, JohnEric W; Krings, Ben M; Shepherd, Brandon D; Waldman, Hunter S; Basham, Steven A; McAllister, Matthew J.
Afiliación
  • Smith JW; Department of Kinesiology, Mississippi State University, Mississippi State, MS 39762, USA.
  • Krings BM; Department of Kinesiology, Mississippi State University, Mississippi State, MS 39762, USA.
  • Shepherd BD; Department of Kinesiology, Mississippi State University, Mississippi State, MS 39762, USA.
  • Waldman HS; Department of Kinesiology, Mississippi State University, Mississippi State, MS 39762, USA.
  • Basham SA; Department of Kinesiology, Mississippi State University, Mississippi State, MS 39762, USA.
  • McAllister MJ; Department of Kinesiology, Mississippi State University, Mississippi State, MS 39762, USA.
Appl Physiol Nutr Metab ; 43(5): 504-509, 2018 May.
Article en En | MEDLINE | ID: mdl-29244956
The purpose of this investigation was to examine the individual and combined effects of ingesting carbohydrates (CHO) and branched-chain amino acids (BCAA) during high-volume upper body resistance exercise (RE) on markers of catabolism and performance. Thirteen resistance-trained males completed 4 experimental trials with supplementation, ingesting beverages containing CHO, BCAA, CHO+BCAA, or placebo (PLA) in a randomized, double-blind design. The beverages were ingested in 118-mL servings 6 times during an ∼60-min RE session consisting of bench press, bent-over row, incline press, and close-grip row. Each RE was performed with 5 sets of repetitions at 65% 1-repetition maximum until volitional fatigue. Blood samples were collected at baseline, immediately postexercise, and 60 min postexercise to assess glucose and insulin. Cortisol was assessed immediately and at 60 min postexercise. No significant performance benefits were observed for any RE. CHO+BCAA (152.4 ± 71.4 ng/mL) resulted in the lowest cortisol levels, which was lower than BCAA and PLA (193.7 ± 88.5, 182.8 ± 67.5 ng/mL, p < 0.05), but not different from CHO (165 ± 76.5 ng/mL, p = 0.342). Postexercise insulin concentrations were significantly higher with CHO (4.79 ± 3.4 mU/L) compared with BCAA and PLA (3.7 ± 2.0, 3.5 ± 1.8 mU/L, p < 0.05), but not different from CHO+BCAA (4.3 ± 2.5 mU/L, p = 0.339). There was no treatment effect for glucose, but glucose significantly increased from baseline to immediately postexercise and significantly decreased at 60 min postexercise. Ingesting beverages containing CHO with or without BCAA during upper body resistance exercise may promote a more favorable postexercise less catabolic environment.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Hidrocortisona / Carbohidratos de la Dieta / Entrenamiento de Fuerza / Aminoácidos de Cadena Ramificada / Insulina Tipo de estudio: Clinical_trials Límite: Adult / Humans / Male Idioma: En Revista: Appl Physiol Nutr Metab Asunto de la revista: CIENCIAS DA NUTRICAO / FISIOLOGIA / MEDICINA ESPORTIVA / METABOLISMO Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Canadá
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Hidrocortisona / Carbohidratos de la Dieta / Entrenamiento de Fuerza / Aminoácidos de Cadena Ramificada / Insulina Tipo de estudio: Clinical_trials Límite: Adult / Humans / Male Idioma: En Revista: Appl Physiol Nutr Metab Asunto de la revista: CIENCIAS DA NUTRICAO / FISIOLOGIA / MEDICINA ESPORTIVA / METABOLISMO Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Canadá