Here are 10 yoga ball exercises to build a super strong core 1 Stability ball crunch 2 Stability oblique crunches 3 Stability ball knee raises 4 Bicycle crunches 5 Ball tucks 6 Stability ball pikes 7 Forearm plank jacks 8 Ball hip thrust 9 Stability ball hands to feet pass 10 Wide side crunches These are all amazing Combine 5 or more to have those abs on fire