I was also just thinking about....I run everyday, well, 5 days a week now...but i do 4 miles everyday....does this make my body go into too much of a "routine" mode, where I don't burn as much fat as I want to? Or does it not really matter? I have noticed a lot of people say that variety is better, but does it really matter as long as I am running???? I want to work up to 30 miles a week....so far, its at 20, and i have awhile to build up.......but nonetheless, I was just wondering what yall thought....thanx!