Dr. Oz, who is frequently on Oprah's television show, and another doctor, talked about the Plank exercise this morning on Good Morning America. Assume a push up position, except rest on your forearms and elbows, not hands. Keep your body as straight as possible, about half a foot over the floor. Hold it there. If you hold it for 15-30 or so seconds, your abdominal muscles are in good shape. If you hold it for 45 or more seconds, they are in great shape.
I have been working out my abdominal muscles since I was 10 years old. If I lose more weight, I would show my six pack. I have some cuts now. I held it for 60 seconds and could have gone for more. If anything, my lower back, which I do not work out as much as my abdominal muscles, started to get weak first. Make bets with your friends on how long you can hold it and win some money. Write a comment and let us know how you are doing.
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.