"As a rule of thumb, weight loss is generally 75 percent diet and 25 percent exercise. An analysis of more than 700 weight loss studies found that people see the biggest short-term results when they eat smart," Talbott explained to the Huffington Post. "On average, people who dieted without exercising for 15 weeks lost 23 pounds; the exercisers lost only six over about 21 weeks. It's much easier to cut calories than to burn them off. For example, if you eat a fast-food steak quesadilla, which can pack 500-plus calories, you need to run more than four miles to 'undo' it!"
Source : http://www.daytondailynews.com/lifestyles/health-med-fit/what-the-best-way-lose-weight-with-minimal-effort/SsIqTDDp1YUmZ5Q6gheanL/