Medicine balls are ideal for everyday use in strength and cardio training. Improve core strength, promote better balance, and cultivate coordination. The weighted strength-training ball works well for a wide range of upper- and lower-body workouts, including the classic medicine ball workout where you throw the ball back-and-forth with a gym buddy or personal trainer. The ball comes with a textured finish, which helps ensure a safe, secure grip--whether holding it with bare hands or weight-training gloves. Better control means improved performance during workouts. Note: The 20, 25, and 30 pound ball are an older style, and not considered Premium.