Exercise burns calories and builds muscle and bones. It is a necessity for good health at any stage in life, especially for senior citizens. Many health problems faced by older people might have been avoided if exercise had been part of a daily routine. Any movement burns calories. I could write a weight loss book in one sentence: “If you burn more calories than you take in, you will lose weight,” end of book. I coauthored Lose the Weight, and Keep the Faith, with Nick Gaglione, a fitness trainer. “Cut and burn” was the crux of our message. If you cut calories and burn calories through purposeful exercising you will lose weight. To lose a pound a week, you must burn 3500 calories more than you consume.