This is my "theory": When you work out, time stands still. If you did biceps curls 10years ago and you do them the same way - same position and range of motion, and somewhat heavier weight and more sets and repetitions, your muscle and then your mind and spirit will have memory. To your consciousness and body, you will be the same as you were 10 years ago when you did the same exercise. Your body's cells may actually grow younger.
I read Eckhart Tolle's new book A New Earth. He talks about timelessness when you are connected to Consciousness. Working out is a primary way to do this.
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.