"Harold Buck" <
[email protected]> wrote in message
news:[email protected]...
> In article <
[email protected]>, Dot
> <dot.h@#att.net> wrote:
>
> > Given what Endurox tasted like - after I got over the gag response (I had a whole can to use,
> > not a 1-bottle envelope) - I'm waiting for an appropriate time to try the single envelope (I
> > learned) of Acclerade. Aside from taste, I'm finding I prefer the taste of milk-like product for
> > recovery although I did find a dilution factor that made the endurox
>
>
> I tried Accelerade. It's not good, but I can drink it. However, I've heard that their claims about
> including protein in the drink mix having a huge effect on endurance have been discredited. Does
> anyone have details on this?
>
> --Harold Buck
>
>
> "I used to rock and roll all night, and party every day. Then it was every other day. . . ."
>
> - Homer J. Simpson
You can read Gatorade's take on it at www.gssiweb.com (if the article is still up). Protein provides
on a small % of total energy for exercise and requires many, many steps to get to ATP (the
"currency" of energy). The only study I have seen is an abstract from the U of Texas lab. My
critique is that the performance measure is a weak one (not sure why exercise scientist colleagues
cannot use real-life performance measures). There were also some methodological errors from what I
remember of the abstract (not that the abstract tells you much).
What the heck, here is the link to Gatorade's take and the research it quotes...
http://www.gssiweb.com/reflib/refs/338/Protein_in_Sports_Drinks.cfm?pid=38
Below is the abstract from PubMed...
Int J Sport Nutr Exerc Metab. 2003 Sep;13(3):382-95. Related Articles, Links
Effect of a carbohydrate-protein supplement on endurance performance during exercise of varying
intensity.
Ivy JL, Res PT, Sprague RC, Widzer MO.
Department of Kinesiology and Health Education, The University of Texas, Austin, TX 78712, USA.
Increasing the plasma glucose and insulin concentrations during prolonged variable intensity
exercise by supplementing with carbohydrate has been found to spare muscle glycogen and increase
aerobic endurance. Furthermore, the addition of protein to a carbohydrate supplement will enhance
the insulin response of a carbohydrate supplement. The purpose of the present study was to compare
the effects of a carbohydrate and a carbohydrate-protein supplement on aerobic endurance
performance. Nine trained cyclists exercised on 3 separate occasions at intensities that varied
between 45% and 75% VO2max for 3 h and then at 85% VO2max until fatigued. Supplements (200 ml) were
provided every 20 min and consisted of placebo, a 7.75% carbohydrate solution, and a 7.75%
carbohydrate/1.94% protein solution. Treatments were administered using a double-blind randomized
design. Carbohydrate supplementation significantly increased time to exhaustion (carbohydrate 19.7
+/- 4.6 min vs. placebo 12.7 +/- 3.1 min), while the addition of protein enhanced the effect of the
carbohydrate supplement (carbohydrate-protein 26.9 +/- 4.5 min, p < .05). Blood glucose and plasma
insulin levels were elevated above placebo during carbohydrate and carbohydrate-protein
supplementation, but no differences were found between the carbohydrate and carbohydrate-protein
treatments. In summary, we found that the addition of protein to a carbohydrate supplement enhanced
aerobic endurance performance above that which occurred with carbohydrate alone, but the reason for
this improvement in performance was not evident.
the biggest problem I have is that the CHO-PRO combo provides more total energy. A better design
would have been to have the CHO only beverage have an additional 1.94% CHO to make the two drinks
isocaloric. It is interesting that insulin levels went up since usually in exercise, insulin levels
do not rise and can even drop. One function of insulin is to drive glucose into the muscle for
storage as glycogen. Since this would not be happening at the exercise intensity described (at least
not at the higher end).
I can give one reason for improved performance: more energy taken in.