In terms of fitness, earth signs like measurable results. They like to be able to calculate situations and use concrete facts to do so. This is why a pedometer, smart watch, or fitness tracker would be perfect for you. You like to be able to know the exact number of steps you have taken so you can use that information to plan, to calculate further exercise or meals, or as a motivator for yourself. Those folks who go willy-nilly into exercise are not for you; hard facts and organization will get the job done for an earth sign.