Glycogen is refueled very soon after consuming carbs. It isn't something that just drains continually throughout the week, that would result in constant fatigue (Unless of course you aren't consuming carbs).
If you are just keeping carbs low throughout the week days then your glycogen levels will be somewhat lower and your body will have to find other means to supply energy (fats, aminos, proteins and muscle as a last resort). You want to keep at a low intensity to ensure that you are using more fatty acids as fuel as opposed to higher intensity which uses mostly carbs.
Also, the carb up's main purpose is not to refuel your glycogen (even though it does do that). You want it to give yourself a metabolism spike that will hopefully stay elevated for the next couple low carb days (These are the days where your body will make the most progress in the fat burning department...Spiked metabolism + Low glycogen levels).
I still would not want to do a 5 day straight low carb because that will just drain you mentally and phsyically depending on how low you go. Especially if you are doing any type of strength training (not sure if you are or not), you NEED more carbs on your workout days for the energy alone.
If your sole goal is fat loss and you are not worried about making muscular gains or even experiencing some losses, then you should be fine with low intensity throughout the week. I'd consume some bcaa's before and after any cardio I do.
Sorry if I'm explaining stuff you already know I'm just making sure you understand what it is all about.
<message edited by Chalky Palms on Saturday, May 16, 2009 4:12 PM>