They look like one half of a stability ball on a flat base: Bosu Balls. The term Bosu means: both sides up. Users can choose to train with the dome side up or with the flat side up. Whatever side is up, the Bosu Trainer always is instable and forces users to keep aligned during the whole exercises. This improves balance and burns more calories than training on a stabile piece of exercise equipment.

The list of Bosu Ball workouts is endless. Cardio workout like steps, knee lifts, and quads can be performed. Stepping on the unstable surface of the Bosu has a lower impact than on the floor. On the other hand, the core muscles get more worked because of the wobbling. That improves balance and flexibility. Other Bosu Ball exercises are great to build up muscle mass, for example, sitting on the dome side and crunch or push ups with hands on the ball. In these cases, the ball gives support, but also forces to align.

For the Bosu 3D System Balance Trainer, a platform with handrail is added to the half ball. The platform is fitted to place the Bosu Ball on it. People can stand on the wobbling ball, hold on the rail and do the workout.

Untrained persons often can not imagine how many muscles it needs simply to stand on that weak surface. This little exercise can help people with balance problems to get rid of them. Extraordinary many physical therapists use the Bosu Trainer for rehabilitation treatment and recommend them to their patients.

However, 3D System is not only beneficial for beginners and physical therapy. It also increases the range of workout for advanced exercisers. Additional adjustable resistance tubing belongs to the Bosu 3D and provides another big bundle of Bosu Ball exercises. The product comes with a DVD which shows beginners how to perform correct exercises. Advanced users may be used to such exercises but can double check their own habits. Additional DVDs and videos are available on the Internet.

The Bosu 3D stand measures 39 x 29 inches, but users need space around it for floor exercises. Browsing reviews for criticism points, we find some complaints that the screw holes were not aligned. One hint might help with this problem: Tighten the screws slowly until they are all in their holes, and then fasten them fully.

Bosu Balls are ideal for everyone from kids to advanced athletes. No other piece of exercise equipment provides such a range of workout. Very beneficial is the dual effect: we can do usual exercises with specific support and improve coordination and balance at the same workout. Last but not least, Bosu Balls are affordable and sometimes the Bosu 3D System Balance Trainer does not cost much more than just the ball.