"Batteries Running Down"
This term is frequently used to describe the type of fatigue that is the most common symptom of PBC. Those who experience it know what they want to do or how they are going to do it, but their arms and legs just won't let them.
Research has shown that there is a change in the way that our muscles work when we have PBC. There is a build up of lactic acid after even the smallest amount of exercise that we do. This may help to understand the mechanism behind the fatigue occurring.