The causes of leg cramps in secondary school students are mainly the following: 1. Due to the high activity, the muscle tissue is consumed more, and the inflammation and metabolites such as lactic acid are gradually increased, which can easily induce leg cramps when the leg muscles are contracted and exerted. 2. This is because of the fact that the leg muscles become more tense and the blood circulation decreases, leading to local inflammation and further accumulation of metabolites, which can easily induce leg cramps. 3, due to hypocalcemia, such as eating less calcium ions or metabolizing more, it will lead to a relative lack of calcium ions in the body and induce leg cramps. The actual fact is that you will need to take calcium tablets and foods that contain more calcium ions such as meat and milk eggs, bone broth, carp soup, etc., so that you can fundamentally solve the situation of leg cramps.