Get in the plank position. Get on the floor with palms of your hands and balls of your feet. Keep your back and hips on the same level. Now, bring your hands and feet together by using your abdominal muscles, not your back, hips or butt. This is very difficult. Try to do it five or ten times at a time, according to your ability and as long as you can. Breathe: Exhale when you bring your hands and feet closer together. Your lower back and butt will move up, but do not let this be too much, as this may indicate you are not using your abdominal muscles.
My third book, Pocket Guide to Fitness, is available on http://www.authorhouse.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. These two books are on my Web sitehttp://www.louizapatsis.com.