In 1979, Pol Pot and the Khmer Rouge were forced from power by the invading Vietnamese. Pol Pot officially resigned the leadership in 1985 but appears to have retained considerable influence.
Muscle fatigue. Muscle fatigue is the decline in ability of a muscle to generate force. It can be a result of vigorous exercise but abnormal fatigue may be caused by barriers to or interference with the different stages of muscle contraction.
Anemia can be caused by iron deficiency, vitamin deficiency, chronic disease, bone marrow disease, autoimmune disorders and sickle cell anemia, among other causes. Anemia can be temporary or chronic, and its severity ranges from mild to marked. Cancer can cause extreme fatigue and weakness.