Before revision: The following causes have been proposed for acute muscle soreness: Accumulation of chemical end products of exercise in muscle cells such as lactic acid and H+ Muscle fatigue (the muscle tires and cannot contract any more) There are no modern effective treatments for AMS.
After revision: There are two causes of acute muscle soreness: Accumulation of chemical end products of exercise in muscle cells such as lactic acid and H+ Muscle fatigue (the muscle tires and cannot contract