Hold a medicine ball of a weight that gives you a workout but that you can use for four sets of ten repetitions of this exercise. Hold the ball before you and perform a stationary lung with your right leg forward. Alternatively, you can lunge your right leg laterally to your right or backward. Repeat for the left leg. Each time you move your leg, extend the ball with both hands at chest level, and bring it back to an inch before your chest when you return your leg. Do everything in smooth motions. Do four sets of ten repetitions, choosing to move your leg forward or laterally. For a more advanced exercise, move each leg forward, laterally and backward, and do the same with your left leg, for one repetition.
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.BarnesandNoble.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.