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.
At some point, nearly everyone suffers from fatigue. In most cases, it's acute fatigue -- fatigue that occurs suddenly but lasts less than three months and is usually caused by lifestyle or environmental factors such as physical exertion, stress, lack of sleep, dehydration, or inadequate diet.ther substances that can cause fatigue include many over-the-counter and prescription medications, including some antihistamines, blood pressure medications, steroids, tranquilizers, and painkillers as well as marijuana and many other illegal drugs.