Scratch, I do get what you say, the theory is that first you replenish muscle glycogen, then liver and then you start converting in fat. So basically you do not burn fat but you avoid an early storage stop, before fully recover glycogen levels and subsequently start to store fat.
My knowledge about human systems and how they work is, I feel, quite adequate. What I try to find through questions is what everyone has to contribute through actual experience, canine sience, or human science applied to dogs as guess work. In many pit forums I see all the time explanations about everything but I prefer to be able to put it under a category such as experience, dog applied facts or science from other mamals.
For example, FrostyPaws says that glycogen reuptake is something like 60-65%, I do not argue with that but I like to be able to see where it comes from. It helps me to better evaluate a piece of advice.
I remember talking to gd with gringo, he told me that he followed mayfields' advice about giving honey to a dog prior to working out for higher training output, I tried it and it works. Today he works with bee pollen and other supplements. In case anybody feels this info is of some use.
I also find often usefull info in sources about racing dogs, the bets and the money at stake there is much higher, so there is more research involved.