Good Trunk Excercises on a ball??

Starklover

I am looking for some good exercises to help strengthen core, mostly ones to help with muscles in my back that are around the spine!

Any help is appreciated!

trail_rnr

Lots of good ones here:

http://exercise.about.com/library/bladvancedball.htm

Make sure you read the descriptions; they tell how to make the exercises easier to start. Some of them are really tough!

Starklover

Thanks!