Polynomstapler
New member
Hab mal einpaar Studien rausgesucht. Zusammenfassend: Die Ernährung unmittelbar nach dem Training scheint wesentlich für die Trainingsfortschritte zu sein und sollte aus Kohlehydraten UND Protein/Aminosäuren bestehen.
Glycemic carbohydrates consumed with amino acids or protein right after exercise enhance muscle formation.
Suzuki M.
School of Sport Sciences, University of Waseda, Tokorozawa, Saitama, Japan 359-1192.
This review shows the importance of high-glycemic carbohydrates consumed together with protein in enhancing the exercise-induced muscle formation relative to timing of intake. Insulin, which increases in blood after glycemic carbohydrate ingestion, seems to effectively stimulate protein synthesis and inhibit protein degradation right after exercise rather than later. This presents a new aspect in nutrition: the importance of intake timing in addition to the composition and amount of nutrients.
PMID: 12828198 [PubMed - in process]
Independent and combined effects of amino acids and glucose after resistance exercise.
Miller SL, Tipton KD, Chinkes DL, Wolf SE, Wolfe RR.
Dairy Management, Inc, Rosemont, IL, USA.
PURPOSE: This study was designed to assess the independent and combined effects of a dose of amino acids ( approximately 6 g) and/or carbohydrate ( approximately 35 g) consumed at 1 and 2 h after resistance exercise on muscle protein metabolism. METHODS: Following initiation of a primed constant infusion of H -phenylalanine and N-urea, volunteers performed leg resistance exercise and then ingested one of three drinks (amino acids (AA), carbohydrate (CHO), or AA and CHO (MIX)) at 1- and 2-h postexercise.(5) RESULTS: Total net uptake of phenylalanine across the leg over 3 h was greatest in response to MIX and least in CHO. The individual values for CHO, MIX, and AA were 53 +/- 6, 114 +/- 38, and 71 +/- 13 mg x leg x 3h. Stimulation of net uptake in MIX was due to increased muscle protein synthesis. CONCLUSIONS: These findings indicate that the combined effect on net muscle protein synthesis of carbohydrate and amino acids given together after resistance exercise is roughly equivalent to the sum of the independent effects of either given alone. The individual effects of carbohydrate and amino acids are likely dependent on the amount of each that is ingested. Further, prior intake of amino acids and carbohydrate does not diminish the metabolic response to a second comparable dose ingested 1h later.
PMID: 12618575 [PubMed - in process]
Acute response of net muscle protein balance reflects 24-h balance after exercise and amino acid ingestion.
Tipton KD, Borsheim E, Wolf SE, Sanford AP, Wolfe RR.
Metabolism Unit, Shriners Hospitals for Children, Galveston, Texas 77550, USA. ktipton@utmb.edu
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 < 0.01) over 3 h corresponding to exercise and EAA consumption for ES. The difference in phenylalanine exchange between REST and ES was not different for measurements over 24 and 3 h. Increases in NB during ES were primarily the result of increases in protein synthesis. Results for other amino acids were similar. The acute anabolic response of muscle to EAA intake and exercise is additive to the response at rest and thus reflects the 24-h response.
PMID: 12388164 [PubMed - indexed for MEDLINE]
Glycemic carbohydrates consumed with amino acids or protein right after exercise enhance muscle formation.
Suzuki M.
School of Sport Sciences, University of Waseda, Tokorozawa, Saitama, Japan 359-1192.
This review shows the importance of high-glycemic carbohydrates consumed together with protein in enhancing the exercise-induced muscle formation relative to timing of intake. Insulin, which increases in blood after glycemic carbohydrate ingestion, seems to effectively stimulate protein synthesis and inhibit protein degradation right after exercise rather than later. This presents a new aspect in nutrition: the importance of intake timing in addition to the composition and amount of nutrients.
PMID: 12828198 [PubMed - in process]
Independent and combined effects of amino acids and glucose after resistance exercise.
Miller SL, Tipton KD, Chinkes DL, Wolf SE, Wolfe RR.
Dairy Management, Inc, Rosemont, IL, USA.
PURPOSE: This study was designed to assess the independent and combined effects of a dose of amino acids ( approximately 6 g) and/or carbohydrate ( approximately 35 g) consumed at 1 and 2 h after resistance exercise on muscle protein metabolism. METHODS: Following initiation of a primed constant infusion of H -phenylalanine and N-urea, volunteers performed leg resistance exercise and then ingested one of three drinks (amino acids (AA), carbohydrate (CHO), or AA and CHO (MIX)) at 1- and 2-h postexercise.(5) RESULTS: Total net uptake of phenylalanine across the leg over 3 h was greatest in response to MIX and least in CHO. The individual values for CHO, MIX, and AA were 53 +/- 6, 114 +/- 38, and 71 +/- 13 mg x leg x 3h. Stimulation of net uptake in MIX was due to increased muscle protein synthesis. CONCLUSIONS: These findings indicate that the combined effect on net muscle protein synthesis of carbohydrate and amino acids given together after resistance exercise is roughly equivalent to the sum of the independent effects of either given alone. The individual effects of carbohydrate and amino acids are likely dependent on the amount of each that is ingested. Further, prior intake of amino acids and carbohydrate does not diminish the metabolic response to a second comparable dose ingested 1h later.
PMID: 12618575 [PubMed - in process]
Acute response of net muscle protein balance reflects 24-h balance after exercise and amino acid ingestion.
Tipton KD, Borsheim E, Wolf SE, Sanford AP, Wolfe RR.
Metabolism Unit, Shriners Hospitals for Children, Galveston, Texas 77550, USA. ktipton@utmb.edu
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 < 0.01) over 3 h corresponding to exercise and EAA consumption for ES. The difference in phenylalanine exchange between REST and ES was not different for measurements over 24 and 3 h. Increases in NB during ES were primarily the result of increases in protein synthesis. Results for other amino acids were similar. The acute anabolic response of muscle to EAA intake and exercise is additive to the response at rest and thus reflects the 24-h response.
PMID: 12388164 [PubMed - indexed for MEDLINE]