Customer Rating: 
Summary: girlfriend loves it
Comment: like always, a quick review:
my girlfriend has been using the bosu ball in the gym since 2 years, mainly for abs and legs. She loves it, and since I gave it to her on Christmas, uses it every day.
I myself are not the biggest fan, probably because I get bored of it quickly and are not very creative when it comes to using it for different exercises.
Little expensive for my taste but what don't you all do for the girlfriend...
Customer Rating: Summary: Use it Everywhere, for Everything, to Get More Results Per Workout
Comment: Balance Disc and Bosu Balls are both essential tools for increasing proprioception, stability, and strength.
You can do push-ups, squats, lunges, and other bodyweight exercises on these equipments to increase the intensity and versatility of each workout. Try doing the exercises with just one hand or one leg for an even greater challenge.
I sit on my balance disc wherever I go: work, classes, meetings, movies, dates. These tools force you to have a great posture to stay balanced on them. You can slowly raise each leg up to get a nice core workout while you sit.
The balance disc is great since it is convenient to carry and inexpensive. The bosu ball is a worthy investment as well, but you should master the balance disc first.
If you don't feel the burn after 10 repetitions, you are doing the exercise wrong. In all exercises, it is the eccentric portion of the exercise that builds muscle. Do the exercise in a smooth, controlled fashion with a 3 concentric and 6 eccentric count. Squeeze at the peak of the motion to get that extra pump.
As in all exercises, make sure to keep your wrists straight and check your posture with these seven vital points: feet hips-width apart and pointed straight ahead; knees slightly bent; pelvis at perfect middle, as if you are sitting at a bar stool; stomach tight, but not flexed; chest straight and aligned on top of ribs; shoulders parallel to ribs; and neck straight on top of body.
