when I started weight training, I stopped running....because I had hurt my foot and couldn't run for awhile...anyhow as soon as I started the weights, the scale went crazy and STILL is holding higher than before I started which is frustrating....but I train a lot and I train heaviest that I can manage...I noticed that my body itself got smaller, more toned and stronger although the scale has gone berserk...i'm continuing to do weight training because I like how it's changing my body...I eat about 1500 calories or more daily and I try to focus on protein and healthy choices....I find that, if I don't get enough protein in the hours after weight training, I get ravenously hungry and all willpower is out the window