Is Coca-Cola a PED?

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  1. #1
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    Question Is Coca-Cola a PED?

    Fizzy, Tasty, and Maybe Ergogenic Too

    Iíve got my share of vices. For instance, I like to run naked through fields of wheat. (Thatís fair warning in case we go on a road trip together.) As far as the other vices, thereís only one thatís germane to this article. Itís Coke with a capital C, as in Coca-Cola. Diet Coca-Cola.

    I know full well all the reasons I shouldnít drink it, but there are so many ďsinfulĒ things I avoid, canít I just have this one little dietary transgression?

    While you mull that over, let me tell you why Coke is the subject of this article. Iíve long known that some competitive bicyclists like to drink flattened cola drinks during races for some perceived energy boost.

    Itís a strategy I sometimes employ too before working out, a least when Iím out of Spikeģ, only with me itís Diet Coke, and I donít bother letting it go flat because a little case of the burpies certainly isnít going to affect my weight lifting. Besides, they often add a little zest to my Valsalva maneuvers.

    However, I wasnít aware of any actual research on whether Coke (or cola beverages in general), regular or diet, truly has any ergogenic benefits. Until now.

    A team of scientists, writing in the European Journal of Applied Physiology, assessed the ergogenic effects of different flattened cola drinks on performance in competitive cyclists.

    They also determined whether the ergogenic effects, if any, were a result of the caffeine or the sugar. It turned out that Coke, or more precisely, cola drinks, really are ergogenic, which is kind of like finding out that chocolate donuts make you lose weight.

    Thatís surprising enough, but the answer to what it was that provides a kick to the padded spandex shorts is what was really eye-opening.

    WHAT THEY DID AND WHAT THEY FOUND
    The scientists recruited 13 competitive cyclists to participate in a randomized, double-blind crossover design study.

    Each cyclist completed 45 minutes of a ďconstant power boutĒ at 69% of their maximum workload, during which time they consumed a total of 16 ml/kg (divvied up into four drinks) of flattened decaf diet cola (the placebo), caffeinated diet cola (diet cola), and cola containing caffeine and sugar (regular cola).

    Ratings of perceived exertion were lower with both the regular cola and diet cola than with the placebo. Likewise, the regular cola and diet cola similarly increased mean power, minimum power, and total work (but not peak power).

    A LITTLE DUCK SNORT OF COFFEE
    What their findings suggest is that it was the caffeine that provided all the ergogenic assistance; that sugar didnít do squat.

    Regardless of the cause, the researchers concluded the following:

    ďWe provide evidence supporting the consumption of commercially available cola for high-intensity cycling in competitive cyclists.Ē

    Now, you have to admit that itís a bit surprising that the sugar (pure, rapidly assimilated carbohydrate) in the colas didnít provide any additional ergogenic benefits in the form of temporary energy.

    However, there might be another factor at play: diet colas generally contain more caffeine than regular colas. An 8-ounce serving of the former has about 32 mg. of caffeine compared to the latterís 25 mg.

    So, assuming a cyclist weighs about 150 pounds, and based on the described dosage of 16 ml of cola per kilogram of body weight, the diet cola cyclists ingested about 144 mg. of caffeine, compared to the 112 mg. ingested by the regular, full-caf, full-sugar cola drinkers.

    Could a difference of just 32 mg. of caffeine have ďmade upĒ for the lack of sugar so that both drinks provided roughly the same amount of ergogenic aid? Maybe if the cyclists were ďcaffeine naÔve,Ē but thereís nothing in the study that I saw to indicate they were.

    Of course, both 112 mg. and 144 mg. of caffeine are only a little duck snort of caffeine, especially when you consider that an equivalent amount of coffee would provide approximately 428 mg of caffeine.

    Could there be something else in the cola thatís helping increase performance?

    Maybe. Letís look at another study, one that probably escaped the notice of the current researchers.

    A KICK IN THE KOLA NUTS
    Richardson et al. (2016) compared the effects of regular coffee, decaf coffee, decaf plus powdered caffeine, and water plus powdered caffeine on squat performance.

    We donít need to get into all the details, but the coffee group and the decaf plus caffeine group were able to squat more than the caffeine-only group, the decaf-only group, and the placebo group. The weight lifted by the coffee group was significantly higher than the placebo group but not significantly higher than the decaf group.

    If you tease the results apart, you see that it apparently wasnít just the caffeine that provided coffeeís oomph. Somehow, the coffee and the caffeine worked together to make the athletes stronger, and even coffee without any caffeine worked almost as well as regular coffee. If that werenít the case, the water plus caffeine would work as well as caffeinated coffee.

    The answer might be in the polyphenols contained in coffee. It appears, in the Richardson study at least, that these plant chemicals are somehow improving performance, which brings me back to the colas.

    The original formula of Coca-Cola contained actual kola nuts, which, in addition to caffeine, are filled with epicatechins, D-catechins, tannic acids, and probably a ton of other polyphenols.

    Unfortunately, the Coca-Cola Company stopped using kola nut extracts in its Coke in 2016. Regardless, Coke contains a whole mess of other ingredients, some of which are unknown to all but a few people (and not two, who, as legend claims, never travel on the same airplane together).

    Many ingredients, however, are known. A 2015 study identified at least 58 aroma compounds in common colas, among them vanilla, cinnamon, nutmeg, orange and lemon essential oils, and probably coriander and neroli oil.

    Am I suggesting that these tiny amounts of cola polyphenols might act like the polyphenols in coffee and confer ergogenic aid? Itís possible. Take a look at vanilla, for instance. It alone contains a vast array of polyphenols, with some 200 volatile constituents.

    Itís just peculiar that the cola study showed an increase in performance, given the small amount of caffeine involved. The X factor could be the polyphenols, which are inherent to both coffee and cola (although much less so in the latter). Of course, I could just be nuts.

    Anyhow, it seems that cola drinks, regular or diet, provide some sort of mild performance enhancement, at least as far as high-intensity work is concerned. Maybe we should just leave it at that.


    Sources:
    1. Jonathon R. Fowles, et al. ďFlattened cola improves high-intensity interval performance in competitive cyclists,Ē European Journal of Applied Physiology, 29 July 2021.
    2. Richardson DL, Clarke ND, ďEffect of Coffee and Caffeine Ingestion on Resistance Exercise Performance.Ē J Strength Cond Res. 2016 Oct 30.

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  2. #2
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    I want to drink cola, i drink it. Don't care what it does life's to short to worry about that

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    I despise woka-cola although when I was teenager I used it to clean a corrosion filled battery terminal on an old 68 Camaro and it worked like magic lol

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