Special ball — fitball

An excellent remedy for a flat stomach and a thin waist is an exercise bike. It is only important not to overwhelm, exercising on it. Now there are a variety of models on sale. The option is especially good if the exercise bike is equipped with a table for measuring pressure, pulse and mileage. Training with a special ball — fitball are also effective. Accustomed to handling this projectile, you can turn on imagination and diversify classes.