Rhythm Balls - for a stimulating, targeted massage and directional pelvic training. Rhythm Balls are weighted and nestle inside you, they are discreet, noiseless and comfortable while all the time strengthening your pelvic muscles. Pop the Rhythm Balls inside, lubricate if necessary with KE Exercise Gel, and use them while you are at home, in the car or even out with friends. Practice every day and feel the difference. Our Rhythm Balls are fully washable and a great way for a beginner to learn how to train her pelvic floor muscles.