Description: Add all the benefits of cardiovascular fitness to your AeroPilates workout with the AeroPilates with Free-Form Cardio Rebounder. In fact, with the AeroPilates reformer, you will reach and maintain your target heart rate as effectively as with a treadmill. But unlike the treadmill, the AeroPilates Free-Form Rebounder is low impact and gentle on your joints, and since you are lying on your back, there is no concussion on your legs, hips, or spine.