The Agility vibrating massage ball provides an unmatched comprehensive massage. It is designed to treat small muscle groups. Its high-intensity vibration helps penetrate deep into muscles for an effective tension release massage. With 4 vibration levels, you can adjust the ball's intensity levels to meet your needs. Used by professional athletes, fitness trainers, and physical therapists around the country, the Agility lacrosse balls massage helps the pros excel and reach peak performance levels.