Man blir lite förvirrad med de olika buden. Jag har en annan studie här som säger annat. Några kommentarer?
"Am J Physiol Endocrinol Metab. 2004 Nov 23;
The combined ingestion of protein and free leucine with carbohydrate increases post-exercise muscle protein synthesis in vivo in male subjects.
Koopman R, Wagenmakers AJ, Manders RJ, Zorenc AH, Senden JM, Gorselink M, Keizer HA, van Loon LJ.
Department of Human Biology, Nutrition Research Institute Maastricht (NUTRIM Maastricht University, Maastricht, The Netherlands.
The present study was designed to determine post-exercise muscle protein synthesis and whole-body protein balance following the combined ingestion of carbohydrate with or without protein and/or free leucine. Eight male subjects were randomly assigned to 3 trials in which they consumed drinks containing either carbohydrate (CHO), carbohydrate and protein (CHO+PRO), or carbohydrate, protein and free leucine (CHO+PRO+leu) following 45 min of resistance exercise. A primed, continuous infusion of L-[ring-(13)C6]phenylalanine was applied, with blood samples and muscle biopsies collected to assess fractional synthetic rate (FSR) in the m. vastus lateralis as well as whole-body protein turnover during 6 h of post-exercise recovery. Plasma insulin response was higher in the CHO+PRO+leu compared to the CHO and CHO+PRO trials (+240+/-19% and +77+/-11%, respectively, P<0.05). Whole-body protein breakdown rates were lower, and whole-body protein synthesis rates were higher in the CHO+PRO and CHO+PRO+leu trials compared to the CHO trial (P<0.05). Addition of leucine in the CHO+PRO+leu trial resulted in a lower protein oxidation rate compared to the CHO+PRO trial. Protein balance was negative during recovery in the CHO trial, but positive in the CHO+PRO and CHO+PRO+leu trials. In the CHO+PRO+leu trial, whole-body net protein balance was significantly greater compared to values observed in the CHO+PRO and CHO trials (P<0.05). Mixed muscle FSR, measured over a 6h period of post-exercise recovery, was significantly greater in the CHO+PRO+leu trial compared to the CHO trial (0.095+/-0.006 %(.)h(-1) vs. 0.061+/-0.008 %(.)h(-1), respectively; P<0.05), with intermediate values observed in the CHO+PRO trial (0.0820 +/- 0.0104 %(.)h(-1)). We conclude that the co-ingestion of protein and leucine stimulates muscle protein synthesis and optimizes whole-body protein balance when compared to the intake of carbohydrate only. "
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Det gör inget om det smakar brunt, då och då!
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