Chris Smith said:Steve, I bow to your speed and marathon chops compared to mine, but let me ask you to say more
about this answer. I have read (I think Pfitzinger) that during glycogen loading in the two to
three days prior to marathon day, it's helpful to do a very short, very slow run as an added
stimulus to glycogen storing. What's your take on that?
If the training is really light, yes, I expect it should be OK. But I hadn't heard that it actually
helped. Interesting. And not at all unreasonable. The light runs would maybe keep the enzymes levels
higher than by resting completely... Hmmmmmm.
I was aware of the "eyeballs out" run theory, but that was proposed (and is still is), as the last
run *before* carbo-loading (Wednesday or Thursday morning before breakfast).
This turns out not to be particularly good value-for-money compared to the tiredness and injury
risks it can cause. One isolated run doesn't have much effect on the overall enzymes activity.
Same with the strict "Scandinavian" diet. Not worth the hassle, tiredness and risks, except maybe at
international level.
Research by Taylor (1972) showed that the enzymes which is supposed to be stimulated by the
"exhaustion" run is actually very active already in trained endurance athletes (5 times more than
sedentary subjects).
Adolfsson provided more on this by having subjects pedal with only one leg.
The conclusion was that, for a correctly-trained endurance athlete, 3 days of light training, on
reduced carb diet, followed by three days light training on high-carb diet was perfectly good
enough, if not considerably better overall.