If you assume responsibility for your personal health behaviors then you are more likely to maintain good behaviors. If you don't then you might tend to follow lackluster health behaviors. Think about it like going to class. If you hold yourself accountable to do the work, then you will most likely succeed. However, if you don't hold yourself accountable you most likely won't care what happens.
They may want to appear just as the way the bodies look in an advertisement. And if the bodies are unhealthy bodies in the advertisements then that would be a negative reaction to the advertisement.
That would be rugby. Hope that helps!