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Acute muscle soreness is the pain felt in muscles during and immediately after strenuous physical exercise. The pain appears within a minute of contracting the muscle and disappears within two or three minutes or up to several hours after relaxing it. The following causes have been proposed for acute muscle soreness: *Accumulation of chemical end products of exercise in muscle cells, such as H+〔 *Tissue edema caused by the shifting of blood plasma into the muscle tissue during contraction〔 *Muscle fatigue (the muscle tires and cannot contract any more) Acute muscle soreness is one form of exercise-induced muscle damage, the other being delayed onset muscle soreness, which appears between 24 and 72 hours after exercise. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「acute muscle soreness」の詳細全文を読む スポンサード リンク
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