Nah not doing much reading. First and last marathon in 30 years. I will get round thats alk I am interested in. Few extra bob for muscular dystrophy research then back to real life. Our lass has got a serious health issue at the mo and buggering off running for hours at a time wouldn't br fair.
coincidentally i did a job for a bloke whos son has taken parkrun to australia, apparently there are 3 over now and he set them up, i did say id look hes name up by have forgotten it
@Andy12345 some figures from the beginning to now. These are figures for actually taken part each week not just those registered http://www.parkrun.org.uk/results/historicalchart/
My intention is to run the Berlin Marathon on zero carbs. It's a bit of a risk, and I need to see how it works out in training, but see an increasing number of zero or very-low-carb endurance runners as suggested by Volek and Phinney in 'The Art and Science of Low Carb Performance".
I think the trick is to make sure that you are in deep ketosis through the last couple of months. I eat very little carbohydrate (<25g) but I do a pretty bad job of getting high blood ketone levels unless I'm running a lot, probably because of insulin resistance. Hopefully the late stages of the marathon training plan will tip me into "deep purple" territory.
I've invested in a couple of bottles of this: http://prototypenutrition.com/ketoforce.html which I intend to use on the day. Technically it's "juicing", but I figure that it's no different than the carb heads fueling up on pasta. The rumors are that this stuff is what helped Chris Froome win the TdF. I might dabble with some SuperStarch too.
Thankyou i have had a look at this, the first review i read is here
Well, having participated in multiple Ironman triathlon, 70.3 events, marathons and 1/2marathons, I thought I would try this new "Wunder Carb".
First off, it tastes like someone put sand in your water. Then comes the taste. I got past that. Then about halfway through my work out I was exhausted, and had a gut ache. EVERY TIME I tried it. And I tried it at least a half dozen times. So today, I went back to my GU products. I had no gut issues, had a great "even keel" energy level for over 2 hours, AND I didn't get diarrhea halfway through my workout!
hehe, ill give it a miss, but sounded interesting for a second
Wow! That is pretty extreme.
I am interested to take a look at who/where you've referenced. If memory serves me correct your liver should have approx 100g of 'glycogen' stores, and the muscles have approx 400g, which according to some can take you as far as mile 18 of a marathon without taking on any additional carb. I can appreciate however that if your body's energy pathway is already set to burn fat over carbs, this could be different.
It is extreme. It may even be a little stupid. We'll see.
- Hitting the wall in a marathon is caused by hypoglycemia, when your muscles suck up all your blood glucose and your brain doesn't have enough to function properly.
- Through sustained ketosis, you can down regulate your brain's requirement for glucose from about 120g a day, to about 25g, meaning that your brain is a lot less likely to suffer from hypoglycemia (because you can make 25g a day from proetin and fat via gluconeogenesis)
- A side effect of this is that your muscles (trying to protect your brain) go into "glucose sparing mode" and begin to burn more fat, or at least allow you to run principally on fat at higher intensities than would otherwise be possible.
- But like you say, it's still a question of running slow enough, if you run too fast you'll end up burning more glucose and end up in trouble.
This is a good quick intro:
http://eatingacademy.com/nutrition/the-interplay-of-exercise-and-ketosis-part-i
Sounds like you're super fit Andy, I would be really interested to know what your training program/techniques are to manage your BGs and what med adjustments (if any) you make whilst you train, and if this alters at all during an event.
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