The elliptical is a mainstay in the gym for good reason: it's easy on the joints and it provides a great cardio and total-body workout. But let's face it, the elliptical can also get pretty boring and repetitive. Instead of spending 30 mindless minutes on the machine, maximize your time with one of these 15 workouts. Whether you're a beginner, you're looking for a high-intensity interval workout, or you want to challenge different muscle groups, there's an elliptical workout for you. There's even one for those of you who love the treadmill!