I love this core routine. It is advanced so take it at your own pace. If you don't have a mini ball put a pillow in the small of your back.
A strong core makes such a difference. Did you know:
Back pain is the leading cause of disability worldwide
One-half of working Americans have back pain each year
American's spend about $50 billion each year on back pain
Most back pain is avoidable and is actually caused by:
Lack of exercise
Leading a Sedentary Lifestyle
If this core routine is a bit too intense for you, start this video at 19:30 and follow the core routine that is best for you.