Bloodflow, fatigue, Rio, performance, blackcurrants

Curranz blackcurrant extract capsulesWho needs a title when you can just put 5 random words? Well, of course, they’re not really random and those words spring out from the latest research from Prof. Willems @Chichester Uni into blackcurrant supplementation for endurance athletes.

His double-blind, randomized, crossover study, entitled “Blackcurrant Alters Physiological Responses and Femoral Artery Diameter during Sustained Isometric Contraction”, was published in the open-access journal “Nutrients” and can also be found (here).

The study demonstrated that the “Intake of NZBC extract for 7-days altered cardiovascular responses, muscle oxygen saturation, muscle activity and femoral artery diameter during a 120-s 30%iMVC of the quadriceps.”

So essentially we are looking at:

  • More bloodflow means more oxygen giving enhanced performance and reduced fatigue; and
  • More bloodflow can aid recovery by greater nutrient delivery.

curranz Previous research showed similar and other benefits. For example some of the blackcurrant research (as above) shows vasodilatory effects – beet-it shows similar vasodilatory effects but do the two work together? or just do the same thing? I think the jury is out on that question BUT curranz has still been shown to increase fat oxidation as an energy source when exercising – so that is a different and further positive effect.

Let’s finish by saying that members of the GB Olympic team (eg Tom Farrell) use the curranz product.

I don’t get paid for writing any of this by the manufacturers but I do get the odd free sample from time-to-time. And I only get them because I use them because I think they work.

Source: Can also be found (here).

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Mara
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Would be interesting to see research into whether curranz and beet it do work well together for endurance athletes.

Peter UBERTO
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When you say that these supplements may be good for endurance runners, does that also include 5K and up to 10K or are these distances too short for any benefits. I haf tried the beet juice and I see no improvement as far as I can see although there may be. Inquiring minds want to know.

Jacob Riis
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Jacob Riis

Is it ok just to drink black currant “juice” ? I Denmark we call saft or saftevand. I don’t know why there is no word for it in English. Apparently you call it “fruit drink concentrate” You don’t need to spend money on pills but will get a lovely drink …

The Ribena brand is quite popular and this drink has a volume of 30% of concentrated black currant. Would that also work?

It’s hard to believe that only the New Zealand black currants will do the work…