 Other factors that contribute to the excessive fatigue are a lack of restorative sleep, excess pre-dialysis weight, poor nutritional status, restless legs syndrome and the overall mental status of the patients. Evidently, of all of these factors can contribute to a self-exacerbating process, a vicious circle, of fatigue due to inactivity and further inactivity due to fatigue. This sensation of an enduring fatigue interferes with physical and social activities and feeds perceptions of increased restrictions and barriers, and leads to a significant reduction of physical activity and functional capacity, which in turn contributes to the increased cardiovascular risk and a high mortality rate among these patients. 