Nothing beats the core exercise ball for time efficient core stability exercises. See the core exercise videos below for a couple of core stability workouts.
The exercise ball is one of the least expensive items you can add to your home workouts, and with a little imagination the exercise ball (or stability ball) can be you most valuable piece of workout equipment.
Core muscle exercises with the exercise ball make these exercises easy and enjoyable:
Balance Ball Routines
Back Extensions
Ab and Crunch Exercises
Hip Extensions Rotations
Here's another video to get you inspired:
Core exercises give you the foundation running efficiency and great running form. Try core exercises with a fitness ball - you'll find that core stability workouts with a ball are fun and enjoyable.