Tone to the Core. Soft, Molded Grooved Fingertip Grip, Gel-Filled with Latex-Free Vinyl Shell. Target Abs with Every Move! Improve Core Strength, Functional Movement, Overall Muscle Tone, & Flexibility with a Total Body Workout. Fun & Easy to Use — Tone & Tighten Muscles as You Lift, Throw, Catch, & Swing the Ball. Versatile, Compact, & Portable The Empower® Comfort Grip Medicine Ball is a unique strength-training tool offering a soft, comfortable, alternative to conventional dumbbells. Exercising with a medicine ball improves core strength, functional movement, balance, coordination and fle.