Thank you. Walking has always been my exercise-5 miles per day for 5 days per week for over 20 years. I tried walking last week…wonderful to be outside…bit over half mile and by afternoon, I was in bed with debilitating fatigue and there for three days. I am learning. I think I have three levels of fatigue. Started a journal this morning….sleep remains a problem for me even with meds. Beginning a pacing system as well. Thanks again, it so helpful to hear from others.