Most women feel that dropping 20 pounds would land them in their perfect-body sweet spot. Coincidentally, clinical research shows that losing 10 percent of one's body weight-about 20 pounds for most people-results in instant health benefits: Blood pressure goes down; the heart becomes stronger and arteries, more flexible; the body metabolizes sugars more efficiently, reducing fatigue and boosting energy; muscle appears more toned; mood improves; and even eating habits change for the better simply because of weight loss. Skin and hair look healthier and younger, too. Readers can achieve that kind of weight loss, and the anti-aging rewards that come with it, with the help of 20 Pounds Younger, a program designed by Women's Health magazine's top life stylists, the experts in integrative medicine, nutrition, strength training, meditation, and beauty who have helped Women's Health editor-in-chief Michele Promaulayko optimize her health and fitness.