LOVING this core combo with the fit ball that targets the lower and upper abs, and transverse abdominals! It's a serious bang for your buck! Try it and let Q me know what you think!!! Note: you don't have to hang onto a kettlebe anything will work! Rack, couch, stair banister- anything to provide some stabilitye! SAVE to try and SHARE it with a gym buddy who would do it with you!