Intra-workout drink

[juggernaut]

How much of a difference does Lyle McDonald's recommendation of 15g of dextrose and a combination of 20g of whey in a jug of water during a weight training workout have in muscular growth?

Are there any studies to backup this assertion?

[natron]

How much of a difference does Lyle McDonald's recommendation of 15g of dextrose and a combination of 20g of whey in a jug of water during a weight training workout have in muscular growth?

Are there any studies to backup this assertion?

In comparison to what?

[juggernaut]

In comparison to what?

just plain water. Does it make that much of a difference....sorry forgot to put that in there.

[natron]

just plain water. Does it make that much of a difference....sorry forgot to put that in there.

Yes it dose.

There are many studies backing this notion, and it is basically common sense.

[juggernaut]

Yes it dose.

There are many studies backing this notion, and it is basically common sense.

ok, so then what are the benefits? I do this anyway, but always wondered if this is pure speculation or there is backed research on it.

[Frosty]

Just from a theoretical point of view, I wouldn't want to use a protein during a workout since blood flow is directed towards the muscles and digestion is reduced. If I were going to use something intra-workout it would be either aminos or highly hydrolyzed proteins (preferably di and tripeptides).

The other question is, I have seen information on a PRE-workout drink doubling protein synthesis vs. the same composition post-workout drink. Why wouldn't you just take the drink PRE-workout, since even pure glucose takes a little time to really get into the blood. Isn't it like 20-30 mins to peak?

[juggernaut]

In prepping for a contest on calorie restriction, I do take in a bcaa drink during the training, but never use dextrose, except on a high carb day of cycle rotation.

As for the dextrose prior, I usually dont because I crash and burn too quickly. I prefer fruit and whey to that.

[natron]

My bad, I overlooked during training.

I'll touch on this tomorrow. I don't personally drink during a workout

[SuperSaiyanPump]

If your looking for intra workout drinks try something like intravol by muscletech. Or adrenoline by ultimate nutrition. They both cover the whole intrawork out category pretty well and they don't taste overall bad. The whole theory is that your trying to keep your glycogen stores fuelled up all through your workout. I've been using milos sarcev 3 shakes theory to incoporate the theory and scene some great results.

[TPT]

the following was the first study on the effects of 'intra' exercise carb and protein supplementation. the study showed interesting results.

be back to chat.

http://ajpendo.physiology.org/cgi/co...ract/295/1/E70
Protein coingestion stimulates muscle protein synthesis during resistance-type exercise

Milou Beelen,1 René Koopman,1 Annemie P. Gijsen,2,3 Hanne Vandereyt,3 Arie K. Kies,4 Harm Kuipers,1 Wim H. M. Saris,2 and Luc J. C. van Loon1,2,3

1Department of Movement Sciences; 2Department of Human Biology, Nutrition and Toxicology Research Institute Maastricht, Maastricht University; 3Stable Isotope Research Center, Nutrition and Toxicology Research Institute Maastricht, Maastricht University, Maastricht; and 4DSM Food Specialties, Delft, The Netherlands
Submitted 13 December 2007 ; accepted in final form 22 April 2008

In contrast to the effect of nutritional intervention on postexercise muscle protein synthesis, little is known about the potential to modulate protein synthesis during exercise. This study investigates the effect of protein coingestion with carbohydrate on muscle protein synthesis during resistance-type exercise. Ten healthy males were studied in the evening after they consumed a standardized diet throughout the day. Subjects participated in two experiments in which they ingested either carbohydrate or carbohydrate with protein during a 2-h resistance exercise session. Subjects received a bolus of test drink before and every 15 min during exercise, providing 0.15 g·kg–1·h–1 carbohydrate with (CHO + PRO) or without (CHO) 0.15 g·kg–1·h–1 protein hydrolysate. Continuous intravenous infusions with L-[ring-13C6]phenylalanine and L-[ring-2H2]tyrosine were applied, and blood and muscle biopsies were collected to assess whole body and muscle protein synthesis rates during exercise. Protein coingestion lowered whole body protein breakdown rates by 8.4 ± 3.6% (P = 0.066), compared with the ingestion of carbohydrate only, and augmented protein oxidation and synthesis rates by 77 ± 17 and 33 ± 3%, respectively (P < 0.01). As a consequence, whole body net protein balance was negative in CHO, whereas a positive net balance was achieved after the CHO + PRO treatment (–4.4 ± 0.3 vs. 16.3 ± 0.4 µmol phenylalanine·kg–1·h–1, respectively; P < 0.01). In accordance, mixed muscle protein fractional synthetic rate was 49 ± 22% higher after protein coingestion (0.088 ± 0.012 and 0.060 ± 0.004%/h in CHO + PRO vs. CHO treatment, respectively; P < 0.05). We conclude that, even in a fed state, protein coingestion stimulates whole body and muscle protein synthesis rates during resistance-type exercise.
nutrition; amino acids; muscle anabolism

Address for reprint requests and other correspondence: M. Beelen, Dept. of Human Movement Sciences, Maastricht Univ., PO Box 616, 6200 MD Maastricht, The Netherlands (e-mail: [email protected] )

[TPT]

another study. be back.

http://jn.nutrition.org/cgi/content/...ct/138/11/2198

Nutrient Physiology, Metabolism, and Nutrient-Nutrient Interactions
Coingestion of Carbohydrate and Protein Hydrolysate Stimulates Muscle Protein Synthesis during Exercise in Young Men, with No Further Increase during Subsequent Overnight Recovery1–3,

Milou Beelen4,*, Michael Tieland4, Annemie P. Gijsen5,6, Hanne Vandereyt6, Arie K. Kies7, Harm Kuipers4, Wim H. M. Saris5, René Koopman4 and Luc J. C. van Loon4–6


4 Department of Movement Sciences and 5 Department of Human Biology, Nutrition and Toxicology Research Institute Maastricht, Maastricht University, 6200 MD Maastricht, The Netherlands; 6 Stable Isotope Research Center, Academic Hospital Maastricht, 6229 HX Maastricht, The Netherlands; and 7 DSM Food Specialties, 2600 MA Delft, The Netherlands


* To whom correspondence should be addressed. E-mail: [email protected] . We investigated the effect of carbohydrate and protein hydrolysate ingestion on whole-body and muscle protein synthesis during a combined endurance and resistance exercise session and subsequent overnight recovery. Twenty healthy men were studied in the evening after consuming a standardized diet throughout the day. Subjects participated in a 2-h exercise session during which beverages containing both carbohydrate (0.15 g·kg–1·h–1) and a protein hydrolysate (0.15 g·kg–1·h–1) (C+P, n = 10) or water only (W, n = 10) were ingested. Participants consumed 2 additional beverages during early recovery and remained overnight at the hospital. Continuous i.v. infusions with L-[ring-13C6]-phenylalanine and L-[ring-2H2]-tyrosine were applied and blood and muscle samples were collected to assess whole-body and muscle protein synthesis rates. During exercise, whole-body and muscle protein synthesis rates increased by 29 and 48% with protein and carbohydrate coingestion (P < 0.05). Fractional synthetic rates during exercise were 0.083 ± 0.011%/h in the C+P group and 0.056 ± 0.003%/h in the W group, (P < 0.05). During subsequent overnight recovery, whole-body protein synthesis was 19% greater in the C+P group than in the W group (P < 0.05). However, mean muscle protein synthesis rates during 9 h of overnight recovery did not differ between groups and were 0.056 ± 0.004%/h in the C+P group and 0.057 ± 0.004%/h in the W group (P = 0.89). We conclude that, even in a fed state, protein and carbohydrate supplementation stimulates muscle protein synthesis during exercise. Ingestion of protein with carbohydrate during and immediately after exercise improves whole-body protein synthesis but does not further augment muscle protein synthesis rates during 9 h of subsequent overnight recovery.

[Frosty]

Ingestion of protein with carbohydrate during and immediately after exercise improves whole-body protein synthesis but does not further augment muscle protein synthesis rates during 9 h of subsequent overnight recovery.

So the question is, how much does this really matter for the average gym rat??

[Bekim Rizvani]

Why would you take protein during your workout? If your going to drink anything your work out drink a carb drink to keep you energy up and protein afterward

[Abraxas]

so the question is, how much does this really matter for the average gym rat??

Bingo!

[juggernaut]

So the question is, how much does this really matter for the average gym rat??

Well, obviously to the gym rat, but also in competitive bbing during a bulk/precontest phase?