"I personally have lost about 44 pounds in the last two months on a almost carbless diet and spend most of the time feeling like the energizer bunny (with very rare low energy points for an hour or two). I train on a stationary bike at a level that is equivalent to an extremely slow jog (like running a 11:30 mile). I can do this for an hour and a half at a time and get off and go into work for a full day an hour later."

I don't know if this makes sense to you but I can eat VLC and do things like spinning and swimming and aquajogging and long walking, but running I need carbs. I experience running very differently than other forms of exercise - even intense exercise.