Hardening of the arteries, also called atherosclerosis, occurs when fat, cholesterol, and other substances build up in the walls of arteries. These deposits are called plaques.efinition. Hardening of the arteries, also called atherosclerosis, occurs when fat, cholesterol, and other substances build up in the walls of arteries. These deposits are called plaques. Over time, these plaques can block the arteries and cause problems throughout the body.
CNS fatigue (CNS = central nervous system) is a slightly more convoluted phenomenon, but the term is thrown around frequently in the world of fitness. By itself, the acronym evokes notions of frailty, complication, and extreme caution.NS fatigue (CNS = central nervous system) is a slightly more convoluted phenomenon, but the term is thrown around frequently in the world of fitness. By itself, the acronym evokes notions of frailty, complication, and extreme caution.
There has been much speculation on whether central nervous system fatigue is a disease, such as chronic fatigue syndrome, or is it caused by a lack of energy and build up of waste product. Distinguishing between peripheral and central fatigue, peripheral fatigue refers to events occurring within the motor unit [26].ome of the symptoms experienced by individuals with CFS along with fatigue include disturbances to the autonomic nervous system, psychological disturbances, sleep patterns, poor temperature control, hypersensitivity, cognitive problems, and pain [11,29].