Sit on the floor and lean back on your elbows. Raise your legs bout half a foot from the floor. Do clockwise circles about a foot in diameter, both legs together or one at a time. Do four sets of ten repetitions. Repeat in a counterclockwise fashion.
If you can, raise or lower your legs an inch and repeat the above. Make sure each leg does circles in each direction. If you can, do this in both subsequent positions: with your legs higher and lower than the first position.
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.