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Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "
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22.10.2012 |
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Protein pulse diet doesn't work for young people
The study we're talking about was done by Marie-Agnès Arnal, the scientist who discovered the protein pulse concept. Because Arnal had discovered the anabolic effect of the protein pulse diet in people in their sixties, she repeated her experiment with younger women to see what happened. These subjects were also given 1.7 g protein per kg lean body mass daily for two weeks.
As in the experiment with the older women, the protein pulse diet boosted the body's protein synthesis. However, the protein breakdown also increased, and the catabolic effect increased by more than the increase in the anabolic effect.
None of the effects were statistically significant however, so the researchers concluded that a protein pulse diet has no effect on protein metabolism in younger women. But if you look at the figures below, you might wonder whether the effects would have been insignificant if the researchers had worked with a larger group of subjects.
The figure above compares the effect of the protein pulse diet on nitrogen retention for women in their sixties with the same effect for women in their twenties. The elderly women retained more nitrogen as a result of the protein pulse diet (and therefore built up more muscle mass) and the younger women retained less – although the reduction was not statistically significant.
So a protein pulse diet doesn't work for people in their twenties. We wonder at what age this diet starts to become interesting for natural strength athletes: above the age of 35? Or 45?
Watch this space.
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