But the process that leads to the glycogen breakdown basically stops. Now let's go back to this particular case for just a moment. So let's suppose we have low blood glucose levels because of either exercise or fasting. What our body will want to do is stimulate the process of glycogen breakdown and stop the process of glycogen synthesis. And what that means is in this particular case our body must also be able to regulate the protein phosphatase one. It basically wants to be able to stop the activity of protein phosphatase one when we want to break down glycogen and when we want to stop glycogen synthesis.