A medicine ball is a weighted sphere used for explosive power and core training. Unlike dumbbells, medicine balls are designed to be thrown, slammed, and caught, making them ideal for plyometric and rotational exercises. They come in weights from 2 to 30 pounds and in variants including bounce, non-bounce, and wall-ball designs. They are widely used in athletic conditioning and functional fitness. Medicine ball training improves power, coordination, and core strength. It is also effective for partner workouts and rehabilitation, provided the appropriate weight and bounce characteristics are selected.