Can bad form be a good thing? Like for instance, say you are doing standing barbell curls. If you bend your back a bit and up the weight you are lifting, wouldnt you then give your lower back a bit of a workout as well as your biceps? Couldn't you therefore get the same workout for your bi's and workout other groups at the same time by using bad form? Now i dont mean horrible form like swinging the weight up and using momentum and such, i just mean can different positions and stuff that would be considered "bad form" actually bring more muscle groups into the process of the lift and instead of having more of an isolated exercise, having a bigger compound movement?