Medicine Ball-Wall Core Workout Workout Wednesday: Medicine Ball Core Workout A weighted ball is a great training tool because you can add it to almost any exercise to challenge your core stability and improve coordination. If you're over your ab routine, grab a medicine ball. These core exercises will better your balance and work your abs. Do 3-4 sets. 10 - 15 reps. 1. Rotations throw 2. Squats Overhead throw 3. Mountain Climbers On Ball 4. Alternating rotation with Slam #fitness #KarinaCrossFi