Have you spent hours on the treadmill and elliptical machine each week but still aren't getting results? You're probably stuck in a fitness rut where your body has adapted to your workout routine and just doesn't respond to the activity like it used to. The best way to get over the plateau is to change up your workout and challenge new muscle groups; it's the only way to get your body into shape for the long-term and might even help you stick with your new routine. The Problem With Your Workout ...