Efforts to get the public to exercise regularly, which have emphasized the positive health effects of exercise rather than the dangers of a sedentary lifestyle, have met with little success  In contrast, efforts to curb cigarette smoking, which have emphasized the dangers of smoking rather than the positive health effects of quitting, have been highly successful
Thus, efforts to get the public to exercise regularly would be more successful if they emphasized the dangers of a sedentary lifestyle rather than the positive health effects of exercise
Efforts to curb cigarette smoking would not be more successful if they emphasized the positive health effects of quitting rather than the dangers of smoking.