I'll tell you, CFH, when I switched to diet from regular coke, I lost 30 pounds in about 3 weeks. Not even joking, I just dropped it like a boss. I had lost a lot of weight until I lost my job, then I put some of it back on. Right now I'm back down to about 255, 260 - about 30, 35 pounds lighter than I was in Boston. I don't run, but I do walk a bit each day. Music makes it worthwhile.