How's this for interval and plyometrics training: Last night I attended a class by a Martha Graham apprentice and fellow student where we threw our weight around in a choreographed yet free way. Try leaning to one side whether you are lying down, sitting or standing until the pull of your own weight brings you down. Allow yourself to fall lower or to the floor and then push in another direction until the same thing happens. If you do this from a jumping to standing, then sitting, then laying down pose and then BACK UP AGAIN IN THE SAME SEQUENCE, this is a work out that gets into advanced work. Try it! Choreograph your own routine! You may need to take a nap later!
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.