Shrinking can be a positive, negative, or both when it comes to our goals. Our bodies' sizes can be manipulated through eating and exercise habits. Healthy bodies aren't necessarily a specific size or weight. Body size parameters are, however, associated with greater or less risk for lifestyle disease (type 2 diabetes and heart disease). If that's not motivation to attain a particular body size, then vanity usually is. How, then, does shrinking help and hinder reaching those body size goals?