It does not matter if myoglobin is <10ng/ml, it does not have much clinical significance, it only means that there is less myoglobin in the blood, which is due to myocardial metabolism, and it is usually not a big problem. The normal value of myoglobin should be <90ng/ml. Myoglobin is a small molecule pigment protein that reversibly binds to oxygen to form oxygenated myoglobin, which has the role of transporting and storing oxygen in myocytes. Myoglobin is found only in cardiac and skeletal muscle, and in the event of myocardial damage myoglobin diffuses out of the cardiomyocytes and into the circulation. Myocardial infarction will show an increase in myoglobin, because myoglobin appears early, about 2 hours in the blood, so if myoglobin is still normal after 2 hours in a patient with chest pain, heart disease can be basically excluded. If the myoglobin exceeds 2 times the upper limit of normal at this point, the patient should be alerted to the possibility of cardiac injury and should be monitored. In addition, specific enzymes related to myocardial injury, such as creatine kinase, creatine kinase isoenzyme, troponin, etc., can also be examined in order to jointly assess whether it is a disease of the heart area. Excessive exercise or exercise in life, people will also appear myoglobin elevation, so should be a comprehensive assessment of myoglobin changes, myoglobin <10ng/ml does not have great clinical significance, the patient does not need to be particularly panic, pay attention to regular review can be.