Use fat to burn fat.
Trying yet again to lose those last 10 pounds? We hear you. In fact, 50 percent of women say that within six months they gain back any weight they've managed to ditch. And more than a quarter have dieted so many times they've lost track of the number. Well, get ready to stop the endless yo-yoing: Science has finally come up with simple, groundbreaking solutions for lasting weight loss. We checked in with the top experts in the field and scoured the latest research to bring you the skinny on everything you need to reach your slim-down goals and stay there.
Seriously: Your flab can help you shed pounds. How? Just as there's more than one kind of fat in food, there's more than one type in your body. White fat is the bad
stuff you want to zap. But a second kind, brown fat, actually torches calories. "Up to 80 percent of adults have brown fat deposits in their bodies," says Aaron M. Cypess, MD, PhD, an assistant professor of medicine at the Joslin Diabetes Center and Harvard Medical School. This good fat is powerful because it's packed with mitochondria, the parts of cells that generate heat. When activated, as little as two ounces of brown fat can gobble up as much as 20 percent of your body's calories.
Exercise is one of the best ways to get your brown fat in gear. In a study, scientists at Harvard's Dana-Farber Cancer Institute discovered that working out releases a hormone called irisin, which converts white fat to brown. Exercise for a half hour at least five days a week to turn up the burn.