4. Exercise intolerance
One of the ways weakness and fatigue associated with atrial fibrillation can be detected is as exercise intolerance. While otherwise healthy individuals are able to carry on and complete their workout routines as usual, those afflicted with atrial fibrillation may not be able to do so. Even routine exercise may seem too taxing since the heart has to bear additional work load.
As such, most types of exercises become too difficult to handle and even gentle workouts involving activities like walking or yoga can become challenging.