I decided to start lifting weights a few months back, got pretty into it and ended up gaining about 15lbs in 3 weeks (i'm already heavy so....) which kinda disappointed me... cause I'm tryin' to lose weight... I know muscle weighs more than fat, but I quit lifting and decided i'm just gonna drop my weight down to the target goal before i start lifting again... didn't like lookin' at the scale and my jaw hittin' the floor lol.