If you knew that a 340-gram chocolate-chip frappe (530 calories) would cost you up to two hours of brisk walking, would you still order it?

New research shows that when we have "exercise cost" information readily available, we are less likely to make unhealthful food choices.

The research, by Meena Shah at Texas Christian University, shows that when restaurants give not only the calorie content but also exercise-cost information, customers tend to make better choices.