It’s easy to mix dumbbell exercises with plyometric, cardio combinations, and workout aids like the stepper to customize a workout to your needs. You can set a structure of alternating weights and cardio or use a ladder program. For instance, you may start your workout with 10 reps of four exercises. Two are cardio based, and two are weight-based, but target different muscle groups. Complete all four exercises, and then on your next round, do only nine. As you move through the workout, your…