http://articles.mercola.com/sites/articles/archive/2006/10/05/what-you-assumed-about-weight-loss-and-exercise-may-be-wrong.aspxA Duke University Medical center report on the various factors that affect weight loss points to vigorous, sustained exercise as a key factor. Estimates for the benefits of milder forms of exercise, such as a one-mile walk burning 100 calories, are impreciseenCommunityServer 2008.5 SP1 (Build: 31106.3070)