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.
Possible Explanations for Fatigue. There are many potential causes of fatigue, which can be divided into three general categoriesâlifestyle factors, medical issues, and mental health issues. Lifestyle Factors. If you are experiencing fatigue, your activities and other lifestyle choices may be the root cause.