Sounds pretty solid to me. Folks want to train every day like it's "game day" and they start carb loading all the time. I think this is where the health problems occur. It is an interesting way to minimize intensity running on a lower carb training week. Keep us posted on the results! Make sure to get plenty of veggies during the week to shore up any potential problems with potassium/magnesium loss.
"Survival will be neither to the strongest of the species, nor to the most intelligent, but to those most adaptable to change."