It is possible that a blood sugar of 6.2 just after exercise is normal. If the blood sugar is still high after a period of calmness, further diagnosis and treatment is necessary. After exercising, whether it is a light exercise or a strenuous exercise, the nerves will be over-excited, which will directly stimulate the liver and convert it into glucose, so that the blood sugar will tend to rise. Especially just after exercise, the body is still in a state of excitement, blood sugar rise is normal, do not be too alarmed. After exercise, the body should be adjusted, so that the body is in a normal state and then blood glucose monitoring, if the blood glucose is still showing a tendency to rise, it is necessary to pay attention to, it is recommended to actively consult a doctor to further clarify whether there is diabetes.