ProSource Weighted Medicine Ball for Full Body Workouts MUSCLE TONE & POWER Great for dynamic exercises to increase muscle power, and for developing core strength DURABLE  Textured rubber is built to last for bouncing and throwing against hard surfaces and provides a stable grip IMPROVED FITNESS  Excellent for building strength and stamina while challenging coordination and balance VARIETY  Available from 4-12 lb. for gradual progression. Ideal for various strength levels and muscle groups FULL-BODY WORKOUTS  Great for core exercises, partner workouts, squats, overhead presses, balance, and more