[quote]tayjeremy wrote:
I just read David Barr’s website about the post workout window… and carbs…
well, apparently the window is pretty much 24-hours. and you dont really need a solid meal. He actually recommended what i usually do. 2 Shakes. 1 after workout… another again after… and he even found out that the shake Pre-workout, and the 2nd one post workout are 200% more anabolic than the actual post workout.
Also we don’t need that many carbs… Just go to his website. Kinda shocked me too.
i think its raisethebarr.com? or somthing… lol[/quote]
I can’t find that conclusion for some reason. I did come across the following regarding Leucine supplementation vs EAA supplementation on effects on muscle protein synthesis.
We conclude that increasing the proportion of leucine in a mixture of EAA can reverse an attenuated response of muscle protein synthesis in elderly but does not result in further stimulation of muscle protein synthesis in young subjects.
Also: Co-ingestion of leucine with protein does not further augment post-exercise muscle protein synthesis rates in elderly men - PubMed
Co-ingestion of leucine with carbohydrate and protein following physical activity does not further elevate muscle protein fractional synthetic rate in elderly men when ample protein is ingested.
The two studies that Barr cites for the claim about the 200% greater anabolic response:
From: Essential amino acids and muscle protein recovery from resistance exercise - PubMed
This study tests the hypothesis that a dose of 6 g of orally administered essential amino acids (EAAs) stimulates net muscle protein balance in healthy volunteers when consumed 1 and 2 h after resistance exercise…Because the NB response was double the response to two doses of a mixture of 3 g of EAA + 3 g of nonessential AA (NEAA) (14), we conclude that NEAA are not necessary for stimulation of NB and that there is a dose-dependent effect of EAA ingestion on muscle protein synthesis.
Now, I hope I am not reading this wrong, but it sounds like it is not necessarily two shakes that is beneficial PWO but that the rate of muscle protein synthesis is DOSE DEPENDENT on EAA/NEAA, so consuming double the dose IN ONE SHAKE might be better than spreading it out over two. Does this mean that consuming that same double dose, albeit twice (two shakes), is even better than one shake with the double dose? Possibly, but then look at the last study above about the co-ingestion of leucine with a CHO+PRO drink not elevating the rate of protein synthesis if sufficient amounts of protein are consumed.
Last study that Barr cites (the URL won’t display so search for PubMed ID 10658002):
This study was designed to determine the response of muscle protein to the bolus ingestion of a drink containing essential amino acids and carbohydrate after resistance exercise. Six subjects (3 men, 3 women) randomly consumed a treatment drink (6 g essential amino acids, 35 g sucrose) or a flavored placebo drink 1 h or 3 h after a bout of resistance exercise on two separate occasions…We conclude that essential amino acids with carbohydrates stimulate muscle protein anabolism by increasing muscle protein synthesis when ingested 1 or 3 h after resistance exercise.
So, it doesn’t matter if we wait an hour to consume the PWO drink vs slamming it down immediately when we’re done lifting?