Find a medicine ball that is heavy enough to give you a workout and that you can do for four sets of ten repetitions. Sit on the center of a Swiss Ball. The bigger it is, the harder it will be. Center yourself and sit upright. Hold the medicine ball in front of your belly with arms bent and twist slowly and steadily right, to center, to left.
Disclaimer: None of the above information can be taken as a substitute for advice from a medical professional such as a physician.
My third book, Pocket Guide to Fitness, is available on www.louizapatsis.com, http://www.authorhouse.com, www.bn.com and http://www.amazon.com. If you look up my name on those Web sites, you will find my other books The Boy in a Wheelchair and Life, Work and Play: Poems and Short Stories.