Excessive exercise, calf muscle soreness, mainly for the following reasons: 1, excessive exercise leads to more local lactic acid production, lactic acid will stimulate the peripheral nerves around, there will be a sore feeling. After excessive exercise, strain injury will be formed, the formation of sterile inflammatory lesions, inflammatory metabolites will lead to inflammatory edema around, and after stimulating the peripheral nerves, there will be pain. 2, excessive exercise, blood circulation is faster, the body produced by lactic acid and inflammatory metabolites can be well metabolized, the symptoms are relatively light. After the end of exercise, blood circulation slows down, lactic acid and inflammatory metabolites will gradually accumulate, and a relatively sore feeling will appear. In addition, after the activity, the situation of cold often occurs, there will be sweat during the activity, the sweat gradually evaporates, which will lead to local cold, after the cold will also lead to further slow down the blood circulation, inflammatory metabolites and lactic acid will accumulate and aggravate the symptoms.