Lie down on a mat. Place your arms where comfortable. Bend your knees. Put your right ankle on top of a Swiss ball. Keep your other foot on the floor. Using your right ankle, bring the Swiss ball toward and away from you. Repeat for five sets of the repetitions. Repeat for the other leg. To make the exercise harder, lift your legs from the mat throughout each set.
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 .