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.
11 Causes of Fatigue. There are many possible causes of fatigue with the majority of diseases often resulting in general malaise or extreme tiredness. However, fatigue can also occur in otherwise healthy individuals as an expected response to physical and mental exertion.