Many people with Parkinson's disease experience fatigue. They often say they feel tired, even exhausted. It can be just as disabling and unpleasant a symptom as the motor slowing or the trembling. Fatigue is typically experienced as a state of being tired, weary, exhausted and without energy. Some people say it feels like walking underwater. Everything is an effort and exhausting. You can have fatigue and no depression. Most people with fatigue are not not sad.