The common reasons for frequent cramps in running are as follows: firstly, not to warm up before running, and when strenuous exercise is carried out, the functional state of muscles will not be suitable for strenuous exercise, the nerve reflexes are not adjusted to the best state, and the local blood circulation supply is not sufficient, which leads to muscle dysfunction and cramps; secondly, it can be seen from the excessive amount of running. The second is due to excessive exercise, which exceeds the load level of the leg muscles, resulting in muscle strain, injury or stimulation of the accumulation of local metabolic products, resulting in muscle dysfunction and cramps; the third is due to running when the temperature is too cool or too hot, too cool can easily lead to poor blood circulation throughout the body, which can lead to leg muscle hypoxia and ischemia, resulting in dysfunction. Overheating will lead to excessive sweating, which will produce ionic disorders and electrolyte imbalance in the body, thus producing muscle dysfunction; the fourth one is the patient’s own state, for example, the patient has potassium and calcium deficiency. Then there is the nutritional status is also insufficient, and the muscle strength and muscle function are not the best, which will easily lead to the symptoms of cramps when running.