Because even if you lose weight through dieting alone, your body won't burn fat any easier. To rev up your fat-burning engines, focus less on how often you empty your plate and more on how often you fill your walking shoes.
Fat Burning and More
When a group of sedentary and overweight older adults recently tested three weight loss systems — exercise only (mostly walking), diet only, and exercise plus diet — there was no question about the results. When it came to fat burning, the walkers won hands down over those who simply watched what they ate. The bodies of the people who strutted their stuff used more fat to fuel their activity.