If you prefer working out at home because it's cheap, private, and open 24-7 then you're going to love The Wave ($90). Created by The Firm, this workout accessory is similar to a Step, but it can be turned over and used like a BOSU to challenge your balance, so you get more bang for your buck.

The dual-action Wave comes with three DVDs — the first one illustrating basic maneuvers. The other two DVDs take you through fast-paced cardio workouts utilizing The Wave alone and with dumbbells. Since you're balancing on this rocking step, almost every exercise targets your lower and upper body, abs, and back simultaneously. You also get a fourth DVD called Express Abs, that focuses on using The Wave to tone your core muscles. To make this program even more effective, there's a Success Guide included that outlines diet tips and an exercise calender that maps out a month-long workout plan.

Watch a video clip of The Wave in action, when you read more.

Get Flash to see this player.

I really love how easy The Wave is to use, and how challenging it makes basic exercises like squats and lunges. In just 30 minutes, my heart rate increased at a steady rate and I felt every major muscle working. By the end of my workout, my hips, thighs, and arms were burning in a good way. For $90, it's a great program for someone who wants to burn calories and tone muscles without having to leave their living room.