Read how one staffer got on trying a Bosu ball workout every day for a week, here, or for more core-related content, don't skip our guides to the best core exercises, period, best core workouts ...

Personal trainer shares the three exercises she taught her dad to build a strong core, increase balance and reduce injury.

How to: Start lying on back with arms at sides, right leg bent at 90 degrees, heel resting on round side of Bosu ball, and left leg extended straight in air at 45-degree angle. Keep knees in line ...